CI - use publisher token to checkout and checkin.

[ci skip]

.github/workflows/nightly.yml

@@ -33,6 +33,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+        with:
+          token: ${{ secrets.PUBLISHER_TOKEN }}
       - name: Check license
         id: check_license
         env: