ci: use uv publish instead of pypa action

Switch to using uv publish directly with UV_PUBLISH_TOKEN,
which is simpler and doesn't require OIDC permissions.

Author: dbrattli

.github/workflows/python-publish.yml

@@ -24,11 +24,9 @@ jobs:
       - name: Set up Python
         run: uv python install 3.12
 
-      - name: Build package
-        run: uv build
-
-      - name: Publish to PyPI
-        uses: pypa/gh-action-pypi-publish@release/v1
-        with:
-          password: ${{ secrets.PYPI_API_TOKEN }}
-          skip-existing: true
+      - name: Build and publish to PyPI
+        env:
+          UV_PUBLISH_TOKEN: ${{ secrets.PYPI_API_TOKEN }}
+        run: |
+          uv build
+          uv publish