fix(ci): use secrets.GITEA_TOKEN instead of GITHUB_TOKEN

Per Gitea Actions docs, the auto-injected token is exposed as
GITEA_TOKEN, not GITHUB_TOKEN. The latter is GitHub-Actions-specific
and not aliased on Gitea by default.

Also bumps version to 1.2.2 to trigger a fresh tag-build.

.gitea/workflows/docker-build.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           registry: gitea.shcizo.se
           username: ${{ gitea.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+          password: ${{ secrets.GITEA_TOKEN }}
 
       - uses: docker/metadata-action@v5
         id: meta