Remove workflow related comment from README
Remove workflow related comment from README

The comment was correct, but not relevant.

Also simplified the markdown in the README and made subheadings into level 2 headings instead of level 1 headings
mklein0/git-plugin,pauxus/git-plugin,jacob-keller/git-plugin,kzantow/git-plugin,jacob-keller/git-plugin,mklein0/git-plugin,kzantow/git-plugin,Deveo/git-plugin,v1v/git-plugin,ldtkms/git-plugin,ldtkms/git-plugin,Nonymus/git-plugin,mlgiroux/git-plugin,jenkinsci/git-plugin,MarkEWaite/git-plugin,Nonymus/git-plugin,jenkinsci/git-plugin,kzantow/git-plugin,jacob-keller/git-plugin,ndeloof/git-plugin,recena/git-plugin,v1v/git-plugin,Vlatombe/git-plugin,MarkEWaite/git-plugin,Deveo/git-plugin,MarkEWaite/git-plugin,loomchild/git-plugin,mlgiroux/git-plugin,recena/git-plugin,Vlatombe/git-plugin,loomchild/git-plugin,pauxus/git-plugin,recena/git-plugin,martinda/git-plugin,Vlatombe/git-plugin,ldtkms/git-plugin,MarkEWaite/git-plugin,pauxus/git-plugin,mlgiroux/git-plugin,mklein0/git-plugin,jenkinsci/git-plugin,Nonymus/git-plugin,Deveo/git-plugin,martinda/git-plugin,ndeloof/git-plugin,jenkinsci/git-plugin,v1v/git-plugin,ndeloof/git-plugin,loomchild/git-plugin,martinda/git-plugin