This is a bugfix release with some security updates that while maybe not
critical due to our use of gitea as a read only mirror would be good to
get in anyway. Additionally we'll want to be on the latest 1.20 release
before updating to 1.21.
The changelog can be found here:
https://github.com/go-gitea/gitea/blob/v1.20.6/CHANGELOG.md
Git diff reports no template updates between 1.20.5 and 1.20.6 in the
templates that we override.
Change-Id: Idd38660dce53b5765c1ab4bc021544bd105df138
6cf8b63bc8