fix(ci): disable provenance for Gitea registry compatibility

Add provenance: false to docker/build-push-action to fix
"received unexpected HTTP status: 200 OK" error when pushing
to Gitea container registry.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "tatlock"
-version = "1.2.1"
+version = "1.2.2"
 description = "OpenAI-compatible API with Ollama backend"
 requires-python = ">=3.12"
 dependencies = []