CONTRIBUTING.md: Add token conventions (#981)
CONTRIBUTING.md: Add token conventions (#981)

* CONTRIBUTING.md: Add token conventions

* Shortening the token guidelines

* Minor spacing fix

* Addressing further concerns

* Replacing - by :

deekim/tldr,Phizho/tldr,deekim/tldr,zoisom/tldr,cptdeka10/tldr,UncommonPleb/tldr,Phizho/tldr,zoisom/tldr,katekyan/tldr,AgamAgarwal/tldr,slash3b/tldr,cptdeka10/tldr,zoisom/tldr,slash3b/tldr,felixonmars/tldr,UncommonPleb/tldr,slash3b/tldr,felixonmars/tldr,katekyan/tldr,Phizho/tldr,deekim/tldr,UncommonPleb/tldr,AgamAgarwal/tldr,katekyan/tldr,felixonmars/tldr,cptdeka10/tldr