Updated working groups doc to remove email markdown shortcut.
Updated working groups doc to remove email markdown shortcut.

Using the "<email>" shortcut causes a random encoding to be
generated by markdown to obscure the address from address-harvesting
spambots. But the randomness is undesirable for us because it results
in a new diff everytime the website CI bot runs.

dforsyth/mesos,kaysoky/mesos,reneploetz/mesos,andschwa/mesos,andschwa/mesos,verizonlabs/mesos,chhsia0/mesos,gsantovena/mesos,jpeach/mesos,verizonlabs/mesos,abudnik/mesos,zmalik/mesos,verizonlabs/mesos,zmalik/mesos,dforsyth/mesos,Gilbert88/mesos,gsantovena/mesos,jpeach/mesos,zmalik/mesos,kaysoky/mesos,gsantovena/mesos,chhsia0/mesos,Gilbert88/mesos,Gilbert88/mesos,jpeach/mesos,zmalik/mesos,andschwa/mesos,dforsyth/mesos,asamerh4/mesos,kaysoky/mesos,dforsyth/mesos,reneploetz/mesos,chhsia0/mesos,gsantovena/mesos,Gilbert88/mesos,reneploetz/mesos,jpeach/mesos,abudnik/mesos,abudnik/mesos,dforsyth/mesos,gsantovena/mesos,abudnik/mesos,gsantovena/mesos,reneploetz/mesos,zmalik/mesos,chhsia0/mesos,asamerh4/mesos,reneploetz/mesos,jpeach/mesos,asamerh4/mesos,gsantovena/mesos,andschwa/mesos,verizonlabs/mesos,asamerh4/mesos,reneploetz/mesos,verizonlabs/mesos,zmalik/mesos,abudnik/mesos,kaysoky/mesos,asamerh4/mesos,andschwa/mesos,verizonlabs/mesos,jpeach/mesos,jpeach/mesos,zmalik/mesos,Gilbert88/mesos,dforsyth/mesos,Gilbert88/mesos,kaysoky/mesos,dforsyth/mesos,chhsia0/mesos,Gilbert88/mesos,kaysoky/mesos,kaysoky/mesos,andschwa/mesos,abudnik/mesos,chhsia0/mesos,verizonlabs/mesos,abudnik/mesos,chhsia0/mesos,asamerh4/mesos,andschwa/mesos,reneploetz/mesos,asamerh4/mesos