Use v1

Author: esteele

.github/workflows/update_submodule.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # Checkout
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v1
 
       # Pull latest plone.api
       - name: Pull latest plone.api