Update CONTRIBUTING following #2329  discussion
Update CONTRIBUTING following #2329  discussion

Creation of release branch before end of release dev and releases candidates + follow semver semantic (minor, patch)
lafriks/gitea,typeless/gitea,ethantkoenig/gitea,cez81/gitea,CaeruleusAqua/gitea,jorgesumle/gitea,vdbt/gitea,kubatyszko/gitea,sapk-fork/gitea,lafriks/gitea,jorgesumle/gitea,mjwwit/gitea,Morlinest/gitea,go-gitea/gitea,cumgun/gitea,Bwko/gitea,go-gitea/gitea,kjellkvinge/gitea,kjellkvinge/gitea,CaeruleusAqua/gitea,kubatyszko/gitea,ethantkoenig/gogs,cez81/gitea,lafriks/gitea,Bwko/gitea,ethantkoenig/gogs,Morlinest/gitea,cez81/gitea,andreynering/gitea,Bwko/gitea,dl5rcw/gitea,geek1011/gitea,typeless/gitea,spacetourist/gitea,tboerger/gitea,lunny/gitea,vCaesar/gitea,vdbt/gitea,kubatyszko/gitea,geek1011/gitea,ethantkoenig/gitea,tboerger/gitea,kjellkvinge/gitea,vCaesar/gitea,andreynering/gitea,rems4e/gitea,rems4e/gitea,typeless/gitea,spacetourist/gitea,lunny/gitea,go-gitea/gitea,sapk-fork/gitea,tboerger/gitea,dnmgns/gitea,dnmgns/gitea,dnmgns/gitea,sapk-fork/gitea,lunny/gitea,sapk-fork/gitea,typeless/gitea,mjwwit/gitea,cumgun/gitea