Update release.yml

Author: anyidea

.github/workflows/release.yml

@@ -11,6 +11,8 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v2
+      with: 
+        python-version: '3.9'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
@@ -21,4 +23,4 @@ jobs:
         TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
       run: |
         poetry build
-        poetry publish
+        poetry publish