ci: Add prerelease on push to v2 to GH CI release.yml

.github/workflows/release.yml

@@ -1,7 +1,10 @@
 name: Release package
 
 on:
-  release:
+  push: # On push to these prerelease branches
+    branches:
+      - v2
+  release: # On create a GitHub Release
     types:
       - created
   workflow_dispatch:
@@ -24,7 +27,16 @@ jobs:
         python -m pip install --upgrade pip
         python -m pip install hatch
         hatch env create
+        echo "ASDF_PYDANTIC_VERSION=$(hatch version)" >> $GITHUB_ENV
     - name: Build
       run: hatch build
+    - name: Create GitHub Release (prerelease only)
+      if: github.event.push
+      uses: softprops/action-gh-release@v1
+      with:
+        prerelease: true
+        tag: ${{ env.ASDF_PYDANTIC_VERSION }}
+        files: dist/*
+        generate_release_notes: true
     - name: Publish package distributions to PyPI
       uses: pypa/gh-action-pypi-publish@release/v1