Fix pypa/gh-action-pypi-publish version (v1 tag does not exist)

Use v1.13.0 instead of v1, as this repo only provides full
semver tags (no major-only tags). pinact will pin to hash.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: laughingman7743

.github/workflows/release.yaml

@@ -29,7 +29,7 @@ jobs:
         run: |
           uv build -v
       - name: Publish release distributions to PyPI
-        uses: pypa/gh-action-pypi-publish@v1
+        uses: pypa/gh-action-pypi-publish@v1.13.0
       - name: Release
         uses: softprops/action-gh-release@153bb8e04406b158c6c84fc1615b65b24149a1fe # v2.6.1
         with: