bug(ci): fix dependabot reviewer assignment

Author: dshemetov

.github/workflows/dependabot-assignments.yml

@@ -8,7 +8,7 @@ jobs:
   dependabot:
     runs-on: ubuntu-latest
     env:
-      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      GH_TOKEN: ${{ secrets.CMU_DELPHI_AUTOMATION_MACHINE_DEPENDABOT_PAT }}
     if: ${{ github.actor == 'dependabot[bot]' }}
     steps:
       - name: Assign team to PR