Add kind operator description to the buck query doc.
Add kind operator description to the buck query doc.

Summary: Add a description about the `kind` operator recently added to `buck query`.

Test Plan:
Published docs locally.
  $ bash docs/soyweb-local.sh

vschs007/buck,kageiit/buck,sdwilsh/buck,rowillia/buck,stuhood/buck,vine/buck,Learn-Android-app/buck,vine/buck,clonetwin26/buck,stuhood/buck,rmaz/buck,grumpyjames/buck,Addepar/buck,luiseduardohdbackup/buck,1yvT0s/buck,shs96c/buck,vschs007/buck,ilya-klyuchnikov/buck,brettwooldridge/buck,rhencke/buck,lukw00/buck,bocon13/buck,sdwilsh/buck,dushmis/buck,LegNeato/buck,raviagarwal7/buck,brettwooldridge/buck,facebook/buck,raviagarwal7/buck,liuyang-li/buck,siddhartharay007/buck,raviagarwal7/buck,1yvT0s/buck,grumpyjames/buck,robbertvanginkel/buck,OkBuilds/buck,rowillia/buck,OkBuilds/buck,pwz3n0/buck,facebook/buck,SeleniumHQ/buck,tgummerer/buck,luiseduardohdbackup/buck,pwz3n0/buck,pwz3n0/buck,dsyang/buck,Learn-Android-app/buck,zhan-xiong/buck,darkforestzero/buck,siddhartharay007/buck,artiya4u/buck,k21/buck,kageiit/buck,darkforestzero/buck,tgummerer/buck,davido/buck,sdwilsh/buck,dushmis/buck,sdwilsh/buck,ilya-klyuchnikov/buck,tgummerer/buck,robbertvanginkel/buck,LegNeato/buck,romanoid/buck,janicduplessis/buck,OkBuilds/buck,Addepar/buck,clonetwin26/buck,vschs007/buck,raviagarwal7/buck,janicduplessis/buck,stuhood/buck,rowillia/buck,janicduplessis/buck,vine/buck,davido/buck,Learn-Android-app/buck,vschs007/buck,darkforestzero/buck,clonetwin26/buck,Learn-Android-app/buck,Distrotech/buck,marcinkwiatkowski/buck,brettwooldridge/buck,dsyang/buck,rhencke/buck,illicitonion/buck,nguyentruongtho/buck,davido/buck,siddhartharay007/buck,lukw00/buck,darkforestzero/buck,siddhartharay007/buck,k21/buck,bocon13/buck,SeleniumHQ/buck,OkBuilds/buck,rhencke/buck,mogers/buck,lukw00/buck,ilya-klyuchnikov/buck,Dominator008/buck,justinmuller/buck,robbertvanginkel/buck,Distrotech/buck,shs96c/buck,rmaz/buck,romanoid/buck,zhan-xiong/buck,romanoid/buck,OkBuilds/buck,nguyentruongtho/buck,bocon13/buck,romanoid/buck,dsyang/buck,Addepar/buck,brettwooldridge/buck,romanoid/buck,sdwilsh/buck,dsyang/buck,tgummerer/buck,OkBuilds/buck,shs96c/buck,mikekap/buck,grumpyjames/buck,zpao/buck,brettwooldridge/buck,JoelMarcey/buck,LegNeato/buck,tgummerer/buck,Addepar/buck,zhan-xiong/buck,siddhartharay007/buck,illicitonion/buck,davido/buck,romanoid/buck,mikekap/buck,justinmuller/buck,SeleniumHQ/buck,shybovycha/buck,OkBuilds/buck,1yvT0s/buck,dsyang/buck,mikekap/buck,shs96c/buck,vschs007/buck,brettwooldridge/buck,darkforestzero/buck,shs96c/buck,rhencke/buck,janicduplessis/buck,rmaz/buck,vine/buck,lukw00/buck,tgummerer/buck,rmaz/buck,shybovycha/buck,nguyentruongtho/buck,mogers/buck,Addepar/buck,rmaz/buck,grumpyjames/buck,romanoid/buck,LegNeato/buck,shybovycha/buck,raviagarwal7/buck,romanoid/buck,darkforestzero/buck,shybovycha/buck,shybovycha/buck,justinmuller/buck,ilya-klyuchnikov/buck,artiya4u/buck,OkBuilds/buck,daedric/buck,Learn-Android-app/buck,ilya-klyuchnikov/buck,stuhood/buck,kageiit/buck,SeleniumHQ/buck,brettwooldridge/buck,marcinkwiatkowski/buck,shs96c/buck,facebook/buck,JoelMarcey/buck,darkforestzero/buck,brettwooldridge/buck,mikekap/buck,neonichu/buck,zpao/buck,illicitonion/buck,raviagarwal7/buck,shs96c/buck,robbertvanginkel/buck,Dominator008/buck,zpao/buck,nguyentruongtho/buck,janicduplessis/buck,bocon13/buck,Addepar/buck,k21/buck,daedric/buck,vine/buck,liuyang-li/buck,janicduplessis/buck,bocon13/buck,dushmis/buck,vschs007/buck,liuyang-li/buck,vine/buck,darkforestzero/buck,clonetwin26/buck,grumpyjames/buck,LegNeato/buck,zhan-xiong/buck,dsyang/buck,robbertvanginkel/buck,rowillia/buck,dsyang/buck,mikekap/buck,tgummerer/buck,marcinkwiatkowski/buck,romanoid/buck,clonetwin26/buck,OkBuilds/buck,grumpyjames/buck,marcinkwiatkowski/buck,tgummerer/buck,davido/buck,k21/buck,rhencke/buck,lukw00/buck,luiseduardohdbackup/buck,shybovycha/buck,davido/buck,zhan-xiong/buck,nguyentruongtho/buck,SeleniumHQ/buck,daedric/buck,artiya4u/buck,shs96c/buck,rowillia/buck,k21/buck,grumpyjames/buck,neonichu/buck,justinmuller/buck,sdwilsh/buck,nguyentruongtho/buck,tgummerer/buck,zhan-xiong/buck,dsyang/buck,justinmuller/buck,robbertvanginkel/buck,clonetwin26/buck,stuhood/buck,shs96c/buck,marcinkwiatkowski/buck,zpao/buck,rhencke/buck,dushmis/buck,daedric/buck,rmaz/buck,bocon13/buck,shybovycha/buck,stuhood/buck,k21/buck,k21/buck,rhencke/buck,bocon13/buck,davido/buck,nguyentruongtho/buck,pwz3n0/buck,illicitonion/buck,darkforestzero/buck,LegNeato/buck,vine/buck,robbertvanginkel/buck,stuhood/buck,ilya-klyuchnikov/buck,artiya4u/buck,SeleniumHQ/buck,illicitonion/buck,robbertvanginkel/buck,lukw00/buck,illicitonion/buck,JoelMarcey/buck,rmaz/buck,artiya4u/buck,JoelMarcey/buck,rowillia/buck,JoelMarcey/buck,shs96c/buck,bocon13/buck,artiya4u/buck,justinmuller/buck,pwz3n0/buck,raviagarwal7/buck,neonichu/buck,lukw00/buck,romanoid/buck,1yvT0s/buck,romanoid/buck,artiya4u/buck,vine/buck,daedric/buck,darkforestzero/buck,LegNeato/buck,Dominator008/buck,raviagarwal7/buck,davido/buck,grumpyjames/buck,LegNeato/buck,Addepar/buck,daedric/buck,sdwilsh/buck,davido/buck,ilya-klyuchnikov/buck,rowillia/buck,pwz3n0/buck,Dominator008/buck,justinmuller/buck,Distrotech/buck,Learn-Android-app/buck,marcinkwiatkowski/buck,justinmuller/buck,Distrotech/buck,Dominator008/buck,bocon13/buck,shybovycha/buck,1yvT0s/buck,marcinkwiatkowski/buck,darkforestzero/buck,JoelMarcey/buck,clonetwin26/buck,daedric/buck,OkBuilds/buck,zhan-xiong/buck,marcinkwiatkowski/buck,k21/buck,LegNeato/buck,dushmis/buck,janicduplessis/buck,OkBuilds/buck,dsyang/buck,Addepar/buck,mogers/buck,facebook/buck,siddhartharay007/buck,Distrotech/buck,Dominator008/buck,daedric/buck,ilya-klyuchnikov/buck,Addepar/buck,rmaz/buck,SeleniumHQ/buck,Distrotech/buck,Distrotech/buck,vschs007/buck,sdwilsh/buck,illicitonion/buck,sdwilsh/buck,neonichu/buck,darkforestzero/buck,grumpyjames/buck,Learn-Android-app/buck,vine/buck,mikekap/buck,sdwilsh/buck,brettwooldridge/buck,bocon13/buck,neonichu/buck,k21/buck,dushmis/buck,zhan-xiong/buck,zpao/buck,facebook/buck,liuyang-li/buck,raviagarwal7/buck,sdwilsh/buck,shybovycha/buck,stuhood/buck,liuyang-li/buck,daedric/buck,davido/buck,janicduplessis/buck,bocon13/buck,LegNeato/buck,SeleniumHQ/buck,vschs007/buck,daedric/buck,lukw00/buck,ilya-klyuchnikov/buck,rmaz/buck,vine/buck,raviagarwal7/buck,pwz3n0/buck,zhan-xiong/buck,liuyang-li/buck,robbertvanginkel/buck,grumpyjames/buck,rmaz/buck,rhencke/buck,Dominator008/buck,rhencke/buck,1yvT0s/buck,brettwooldridge/buck,Learn-Android-app/buck,dushmis/buck,shybovycha/buck,robbertvanginkel/buck,Distrotech/buck,justinmuller/buck,SeleniumHQ/buck,zhan-xiong/buck,raviagarwal7/buck,clonetwin26/buck,zhan-xiong/buck,clonetwin26/buck,pwz3n0/buck,dsyang/buck,dushmis/buck,rowillia/buck,illicitonion/buck,stuhood/buck,rhencke/buck,k21/buck,shs96c/buck,1yvT0s/buck,shs96c/buck,Dominator008/buck,mogers/buck,Addepar/buck,Distrotech/buck,janicduplessis/buck,rowillia/buck,JoelMarcey/buck,mikekap/buck,marcinkwiatkowski/buck,JoelMarcey/buck,ilya-klyuchnikov/buck,brettwooldridge/buck,facebook/buck,raviagarwal7/buck,Dominator008/buck,stuhood/buck,davido/buck,siddhartharay007/buck,neonichu/buck,mogers/buck,SeleniumHQ/buck,luiseduardohdbackup/buck,1yvT0s/buck,janicduplessis/buck,janicduplessis/buck,zhan-xiong/buck,ilya-klyuchnikov/buck,neonichu/buck,shybovycha/buck,siddhartharay007/buck,daedric/buck,marcinkwiatkowski/buck,zpao/buck,lukw00/buck,mogers/buck,shs96c/buck,mogers/buck,mikekap/buck,tgummerer/buck,JoelMarcey/buck,raviagarwal7/buck,robbertvanginkel/buck,SeleniumHQ/buck,mikekap/buck,OkBuilds/buck,pwz3n0/buck,brettwooldridge/buck,clonetwin26/buck,mogers/buck,ilya-klyuchnikov/buck,artiya4u/buck,kageiit/buck,illicitonion/buck,stuhood/buck,dsyang/buck,bocon13/buck,LegNeato/buck,liuyang-li/buck,mikekap/buck,rowillia/buck,facebook/buck,artiya4u/buck,grumpyjames/buck,Learn-Android-app/buck,Learn-Android-app/buck,mogers/buck,vschs007/buck,robbertvanginkel/buck,ilya-klyuchnikov/buck,pwz3n0/buck,mogers/buck,pwz3n0/buck,Dominator008/buck,Dominator008/buck,liuyang-li/buck,OkBuilds/buck,justinmuller/buck,liuyang-li/buck,mogers/buck,dushmis/buck,romanoid/buck,liuyang-li/buck,tgummerer/buck,mikekap/buck,zpao/buck,rhencke/buck,dsyang/buck,robbertvanginkel/buck,kageiit/buck,kageiit/buck,JoelMarcey/buck,LegNeato/buck,artiya4u/buck,marcinkwiatkowski/buck,luiseduardohdbackup/buck,k21/buck,k21/buck,rowillia/buck,sdwilsh/buck,vschs007/buck,k21/buck,lukw00/buck,SeleniumHQ/buck,Learn-Android-app/buck,daedric/buck,Distrotech/buck,Addepar/buck,rmaz/buck,neonichu/buck,liuyang-li/buck,rmaz/buck,illicitonion/buck,Dominator008/buck,daedric/buck,Addepar/buck,sdwilsh/buck,lukw00/buck,LegNeato/buck,vschs007/buck,JoelMarcey/buck,SeleniumHQ/buck,kageiit/buck,shybovycha/buck,shybovycha/buck,illicitonion/buck,davido/buck,siddhartharay007/buck,luiseduardohdbackup/buck,luiseduardohdbackup/buck,mikekap/buck,brettwooldridge/buck,davido/buck,rmaz/buck,justinmuller/buck,clonetwin26/buck,clonetwin26/buck,romanoid/buck,marcinkwiatkowski/buck,justinmuller/buck,dsyang/buck,vschs007/buck,JoelMarcey/buck,clonetwin26/buck,marcinkwiatkowski/buck,illicitonion/buck,JoelMarcey/buck,luiseduardohdbackup/buck,vschs007/buck,darkforestzero/buck,artiya4u/buck,luiseduardohdbackup/buck,grumpyjames/buck,Addepar/buck,vine/buck,janicduplessis/buck,illicitonion/buck,dushmis/buck,1yvT0s/buck,rowillia/buck,zhan-xiong/buck,neonichu/buck,justinmuller/buck,Distrotech/buck