Update permissions.en-us.md (#20075)
Update permissions.en-us.md (#20075)

* Update permissions.en-us.md

A few grammar tweaks to make docs a bit more clear.

* Apply suggestions from code review

Co-authored-by: delvh <de75dc486f30b28015fd919fc5449eba02c6f8c6@web.de>

* Update docs/content/doc/usage/permissions.en-us.md

Co-authored-by: 6543 <38d17c89bbb30dc9e2665c7359356aaa08c63a4d@obermui.de>
Co-authored-by: delvh <de75dc486f30b28015fd919fc5449eba02c6f8c6@web.de>
go-gitea/gitea,go-gitea/gitea,go-gitea/gitea