gh-430: fix for release action (#429)

Author: ntessore

.github/workflows/release.yml

@@ -22,6 +22,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Replace stable version with the release version
+        if: github.event_name == 'release' && github.event.action == 'published'
         run: |-
           # store the release tag
           tag="${{ github.ref_name }}"
@@ -36,6 +37,9 @@ jobs:
             --expression "$url_pattern" \
             ${{ github.workspace }}/README.md
 
+          # store the tag since the git checkout is now dirty
+          echo "SETUPTOOLS_SCM_PRETEND_VERSION=${tag}" >> $GITHUB_ENV
+
       - name: Build SDist and wheel
         run: pipx run build