Allow dependabot to make yarn.lock changes (microsoft#153240)

allow dependabot to make yarn.lock changes

Author: joaomoreno

.github/workflows/no-yarn-lock-changes.yml

@@ -18,8 +18,9 @@ jobs:
         run: |
           echo "user: ${{ github.event.pull_request.user.login }}"
           echo "role: ${{ fromJson(steps.get_permissions.outputs.data).permission }}"
+          echo "is dependabot: ${{ github.event.pull_request.user.login == 'dependabot[bot]' }}"
           echo "should_run: ${{ !contains(fromJson('["admin", "write"]'), fromJson(steps.get_permissions.outputs.data).permission) }}"
-          echo "::set-output name=should_run::${{ !contains(fromJson('["admin", "write"]'), fromJson(steps.get_permissions.outputs.data).permission) }}"
+          echo "::set-output name=should_run::${{ !contains(fromJson('["admin", "write"]'), fromJson(steps.get_permissions.outputs.data).permission) && github.event.pull_request.user.login != 'dependabot[bot]' }}"
       - name: Get file changes
         uses: trilom/file-changes-action@ce38c8ce2459ca3c303415eec8cb0409857b4272
         if: ${{ steps.control.outputs.should_run == 'true' }}