Revert automatic releases on every push to main

Releases are published only for manually pushed v* tags again.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -43,14 +43,6 @@ One-time tool setup:
 go install github.com/goreleaser/nfpm/v2/cmd/nfpm@latest
 ```
 
-## Releases
-
-CI (`.gitea/workflows/build.yml`) releases every push to `main`: it tags the
-commit with the next patch version (v0.1.3 → v0.1.4), builds deb + rpm with
-that version and publishes a Gitea release with both packages and the commit
-subjects as notes. To bump minor/major, push a tag yourself (`git tag v0.2.0 &&
-git push origin v0.2.0`); later pushes to main continue from it.
-
 ## Packaging
 
 `packaging/nfpm.yaml` builds both formats from one spec: