Revert workflows to ubuntu-latest until CI image is seeded.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitea/workflows/release.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   release:
     if: ${{ !contains(github.event.head_commit.message, '[skip ci]') }}
-    runs-on: python-repositories-ci
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -22,12 +22,19 @@ jobs:
           COMMIT_MSG: ${{ github.event.head_commit.message }}
         run: scripts/ci/parse-merge-commit.sh "$COMMIT_MSG"
 
+      - name: Set up Python
+        if: steps.meta.outputs.bump != 'skip'
+        uses: actions/setup-python@v5
+        with:
+          python-version-file: .python-version
+
+      - name: Install uv
+        if: steps.meta.outputs.bump != 'skip'
+        run: pip install uv
+
       - name: Bump version
         if: steps.meta.outputs.bump != 'skip'
         id: bump
-        env:
-          UV_INDEX_GITEA_USERNAME: ci-bot
-          UV_INDEX_GITEA_PASSWORD: ${{ secrets.CI_RUNNER_TOKEN }}
         run: scripts/ci/bump-version.sh "${{ steps.meta.outputs.bump }}"
 
       - name: Generate release notes