Update python-publish.yml

add packaging to publish script

.github/workflows/python-publish.yml

@@ -49,6 +49,11 @@ jobs:
       with:
         python-version: '3.9'
 
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install packaging
+
     - name: read changelog
       id: read-changelog
       run: |