Merge pull request #752 from jupyterlab/fcollonval-patch-1

Update python action in CD

Author: fcollonval

.github/workflows/publish.yml

@@ -16,7 +16,7 @@ jobs:
         node-version: '12.x'
         registry-url: 'https://registry.npmjs.org'
     - name: Install Python
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2
       with:
         python-version: '3.x'
     - name: Install dependencies