Change app description to match GH.
Change app description to match GH.

Running **swarm** will yield:
```
NAME:
   swarm - a Docker-native clustering system
```

Signed-off-by: Andrea Luzzardi <442ffe3ffbfd024afcf0b7f8b108d05bca3aae43@gmail.com>

shin-/docker.github.io,allencloud/swarm,NunoEdgarGub1/swarm,joeuo/docker.github.io,shin-/docker.github.io,NunoEdgarGub1/swarm,rchicoli/swarm,dims/swarm,joeuo/docker.github.io,auzias/swarm,johnstep/docker.github.io,kyhavlov/swarm,rutulpatel/swarm,Spritekin/swarm,denverdino/denverdino.github.io,alexisbellido/docker.github.io,schmunk42/swarm,iaintshine/swarm,denverdino/docker.github.io,doronp/swarm,CiaranCostello/swarm,ealang/swarm,JimGalasyn/docker.github.io,affo/swarm,shahankhatch/swarm,aidora/pisces,shubheksha/docker.github.io,barais/swarm,docker/docker.github.io,phiroict/docker,rillig/docker.github.io,mavenugo/swarm,yp-engineering/swarm,shin-/docker.github.io,alexisbellido/docker.github.io,mrjana/swarm,docker/docker.github.io,thaJeztah/docker.github.io,mountkin/swarm,shubheksha/docker.github.io,linecheng/swarm,denverdino/swarm,BSWANG/swarm,joeuo/docker.github.io,mgoelzer/swarm,denverdino/docker.github.io,Aorjoa/swarm,JimGalasyn/docker.github.io,menglingwei/denverdino.github.io,CodeNow/swarm,londoncalling/docker.github.io,joeuo/docker.github.io,resouer/swarm,PeoplePerHour/libswarm,linecheng/swarm,echupriyanov/swarm,PeoplePerHour/libswarm,anweiss/docker.github.io,snrism/swarm,JimGalasyn/docker.github.io,joaofnfernandes/docker.github.io,jdamick/swarm,BSWANG/denverdino.github.io,thaJeztah/docker.github.io,rajdeepd/swarm,denverdino/denverdino.github.io,zkcrescent/swarm,LuisBosquez/docker.github.io,joaofnfernandes/docker.github.io,deis/swarm,qianzhangxa/swarm,morpheyesh/swarm,BSWANG/denverdino.github.io,snrism/swarm,jimmyxian/swarm,cpuguy83/swarm,abronan/swarm,rajdeepd/swarm,sfsmithcha/swarm,aduermael/docker.github.io,marsmensch/swarm,MHBauer/swarm,bsmr-docker/swarm,kunalkushwaha/swarm,FollowMyDev/swarm,denverdino/denverdino.github.io,ricca742/swarm,francisbouvier/swarm,krystism/swarm,thaJeztah/docker.github.io,rav121/swarm,dnephin/swarm,shot/swarm,cgvarela/swarm,beni55/swarm-1,u2mejc/swarm,beni55/swarm-1,docker/docker.github.io,SivagnanamCiena/swarm,schmunk42/swarm,ch3lo/swarm,docker/docker.github.io,rutulpatel/swarm,joaofnfernandes/docker.github.io,gdevillele/docker.github.io,LuisBosquez/docker.github.io,parapsyche/swarm,troy0820/docker.github.io,jzwlqx/denverdino.github.io,kunalkushwaha/swarm,mountkin/swarm,denverdino/swarm,aduermael/docker.github.io,pdevine/swarm,sanscontext/docker.github.io,marsmensch/swarm,moxiegirl/swarm,anweiss/docker.github.io,vlajos/swarm,shin-/docker.github.io,tranceitionalMynd/swarm,pssahi/swarm,jay-lau/swarm,troy0820/docker.github.io,rillig/docker.github.io,resouer/swarm,gradywang/swarm,bdwill/docker.github.io,kyhavlov/swarm,bdwill/docker.github.io,danix800/docker.github.io,morpheyesh/swarm,jzwlqx/denverdino.github.io,docker-zh/docker.github.io,tranceitionalMynd/swarm,liubin/swarm,errordeveloper/swarm,moxiegirl/swarm,LuisBosquez/docker.github.io,atlassian/swarm,gonkulator/swarm,BSWANG/swarm,alexisbellido/docker.github.io,jzwlqx/denverdino.github.io,xFragger/swarm,pssahi/swarm,ehazlett/swarm,shubheksha/docker.github.io,mavenugo/swarm,akerbis/armhf-swarm,shin-/docker.github.io,menglingwei/denverdino.github.io,denverdino/docker.github.io,JimGalasyn/docker.github.io,auzias/swarm,ejholmes/swarm,EderRoger/swarm,phiroict/docker,srikalyan/swarm,johnstep/docker.github.io,sanscontext/docker.github.io,ealang/swarm,docker-zh/docker.github.io,jzwlqx/denverdino.github.io,fugr/swarm,jimenez/swarm,BSWANG/denverdino.github.io,gdevillele/docker.github.io,mrjana/swarm,londoncalling/docker.github.io,xFragger/swarm,rillig/docker.github.io,joaofnfernandes/docker.github.io,doronp/swarm,sanscontext/docker.github.io,gonkulator/swarm,ricca742/swarm,sanscontext/docker.github.io,jeffjen/swarm,christophelec/swarm,mgoelzer/swarm,londoncalling/docker.github.io,SivagnanamCiena/swarm,gdevillele/docker.github.io,EderRoger/swarm,u2mejc/swarm,ezrasilvera/swarm,bdwill/docker.github.io,fugr/swarm,ejholmes/swarm,abronan/swarm,denverdino/docker.github.io,danix800/docker.github.io,joeuo/docker.github.io,aidora/pisces,rav121/swarm,aduermael/docker.github.io,anweiss/docker.github.io,everett-toews/swarm,krystism/swarm,riuvshin/swarm,swarm-hooks/swarm,JimGalasyn/docker.github.io,jay-lau/swarm,aduermael/docker.github.io,iaintshine/swarm,thaJeztah/docker.github.io,deis/swarm,FollowMyDev/swarm,megamsys/swarm,denverdino/swarm-1,rillig/docker.github.io,gdevillele/docker.github.io,tangkun75/swarm,riuvshin/swarm,denverdino/swarm-1,MHBauer/swarm,johnstep/docker.github.io,shot/swarm,dims/swarm,docker/docker.github.io,shubheksha/docker.github.io,unodba/swarm,danix800/docker.github.io,LukasBacigal/swarm,londoncalling/docker.github.io,danix800/docker.github.io,rancher/swarm,adouang/swarm,ehazlett/swarm,anweiss/docker.github.io,jimmyxian/swarm,jimenez/swarm,sanscontext/docker.github.io,CodeNow/swarm,jeffjen/swarm,troy0820/docker.github.io,LuisBosquez/docker.github.io,bpradipt/swarm,akerbis/armhf-swarm,troy0820/docker.github.io,polyverse-security/swarm,liubin/swarm,menglingwei/denverdino.github.io,gradywang/swarm,LukasBacigal/swarm,BSWANG/denverdino.github.io,everett-toews/swarm,phiroict/docker,denverdino/docker.github.io,londoncalling/docker.github.io,bpradipt/swarm,dnephin/swarm,affo/swarm,alexisbellido/docker.github.io,barais/swarm,cpuguy83/swarm,BSWANG/denverdino.github.io,errordeveloper/swarm,bdwill/docker.github.io,joaofnfernandes/docker.github.io,denverdino/denverdino.github.io,FreedomWangLi/swarm,jimmycmh/swarm,parapsyche/swarm,phiroict/docker,phiroict/docker,denverdino/denverdino.github.io,sfsmithcha/swarm,jdamick/swarm,FreedomWangLi/swarm,polyverse-security/swarm,vlajos/swarm,rchicoli/swarm,johnstep/docker.github.io,bdwill/docker.github.io,megamsys/swarm,menglingwei/denverdino.github.io,Aorjoa/swarm,swarm-hooks/swarm,cgvarela/swarm,therealbill/swarm,ezrasilvera/SwarmACLs,bsmr-docker/swarm,therealbill/swarm,pdevine/swarm,menglingwei/denverdino.github.io,shahankhatch/swarm,ezrasilvera/swarm,docker-zh/docker.github.io,chanwit/swarm,ch3lo/swarm,Spritekin/swarm,docker-zh/docker.github.io,anweiss/docker.github.io,unodba/swarm,yp-engineering/swarm,jzwlqx/denverdino.github.io,johnstep/docker.github.io,rancher/swarm,gdevillele/docker.github.io,francisbouvier/swarm,raoofm/swarm,ezrasilvera/SwarmACLs,jimmycmh/swarm,chanwit/swarm,raoofm/swarm,shubheksha/docker.github.io,atlassian/swarm,allencloud/swarm,echupriyanov/swarm,LuisBosquez/docker.github.io,CiaranCostello/swarm,docker-zh/docker.github.io,qianzhangxa/swarm,adouang/swarm,srikalyan/swarm,thaJeztah/docker.github.io,alexisbellido/docker.github.io,tangkun75/swarm,christophelec/swarm,zkcrescent/swarm