switching workflow to use only 1 PAT

Author: HannahZhuSWE

.github/workflows/playwright-scheduled.yml

@@ -56,7 +56,7 @@ jobs:
       with:
         external_repository: mspnp/intern-js-pipeline
         publish_branch: gh-pages
-        personal_token: ${{ secrets.PERSONAL_TOKEN }}
+        personal_token: ${{ secrets.PAT_TOKEN }}
         publish_dir: ${{steps.download.outputs.download-path}}
         destination_dir: test-reports/${{ github.repository }}
         keep_files: true