modify release.yml - 6

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.x"
+          python-version: "3.9"
       - name: Install required packages
         run: pip install setuptools atexit
       - name: Build a source tarball