Rename the token env variable (jupyter#7802)

Co-authored-by: Jeremy Tuloup <jeremy.tuloup@gmail.com>

Author: brichet

.github/workflows/upgrade-jupyterlab-dependencies.yml

@@ -90,7 +90,7 @@ jobs:
 
       - name: Create a PR
         env:
-          GITHUB_TOKEN: ${{ secrets.PERSONAL_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
+          GH_TOKEN: ${{ secrets.PERSONAL_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
         run: |
           set -eux