Add publishing to release workflow.

.github/workflows/release.yml

@@ -33,6 +33,7 @@ jobs:
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
+          name: python-dist
           path: dist/pumpkin_api_py*
 
       - name: Upload artifacts to release
@@ -44,3 +45,21 @@ jobs:
           file: dist/pumpkin_api_py*
           overwrite: true
           file_glob: true
+  publish:
+      name: Publish to PyPI
+      needs: release
+      if: startsWith(github.ref, 'refs/tags/v')
+      runs-on: ubuntu-latest
+      environment:
+        name: pypi
+        url: https://pypi.org/p/pumpkin-api-py
+      permissions:
+        id-token: write
+      steps:
+        - name: Download artifacts
+          uses: actions/download-artifact@v4
+          with:
+            name: python-dist
+            path: dist/
+        - name: Publish
+          uses: pypa/gh-action-pypi-publish@release/v1