docs: Gitea account must have full name set for Git identity (#16792)

* Gitea account must have full name set for Git identity

* Update lib/modules/platform/gitea/index.md

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>

* Update index.md

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>
Co-authored-by: Rhys Arkins <rhys@arkins.net>