Add soba (#121)

Adds an entry for an open source backup tool called soba with Gitea support.

Reviewed-on: https://gitea.com/gitea/awesome-gitea/pulls/121
Co-authored-by: Jon Hadfield <jon@lessknown.co.uk>
Co-committed-by: Jon Hadfield <jon@lessknown.co.uk>

README.md

@@ -67,6 +67,7 @@ A curated list of awesome projects related to Gitea.
 - [Monitoring mixin](https://github.com/go-gitea/gitea/tree/main/contrib/gitea-monitoring-mixin) - Gitea monitoring mixin (Grafana dashboard)
 - [mvoCI](https://codeberg.org/snaums/mvoCI) - very simple Continuous Integration Server written in go. Built-in Gitea support.
 - [Renovate](https://github.com/renovatebot/renovate) - Gitea compatible configurable universal dependability update tool
+- [soba](https://github.com/jonhadfield/soba) - scheduled backups of user/organization Gitea repositories with change detection.
 - [Tea Runner](https://github.com/DavesCodeMusings/tea-runner) - A minimalist Python Flask app that uses Gitea webhooks to perform actions.
 - [woodpecker](https://github.com/woodpecker-ci/woodpecker) - An opinionated fork of the Drone CI system. Built-in Gitea support. (see [docs](https://woodpecker-ci.org/docs/administration/vcs/gitea))
 - [yojo](https://sr.ht/~emersion/yojo/) - A CI bridge from Gitea to SourceHut.