Fix OSSF scorecard branch protection check (open-telemetry#2015)

Author: trask

.github/workflows/ossf-scorecard.yml

@@ -23,8 +23,18 @@ jobs:
         with:
           persist-credentials: false
 
+      - uses: actions/create-github-app-token@df432ceedc7162793a195dd1713ff69aefc7379e # v2.0.6
+        id: create-token
+        with:
+          # analyzing classic branch protections requires a token with admin read permissions
+          # see https://github.com/ossf/scorecard-action/blob/main/docs/authentication/fine-grained-auth-token.md
+          # and https://github.com/open-telemetry/community/issues/2769
+          app-id: ${{ vars.OSSF_SCORECARD_APP_ID }}
+          private-key: ${{ secrets.OSSF_SCORECARD_PRIVATE_KEY }}
+
       - uses: ossf/scorecard-action@05b42c624433fc40578a4040d5cf5e36ddca8cde # v2.4.2
         with:
+          repo_token:  ${{ steps.create-token.outputs.token }}
           results_file: results.sarif
           results_format: sarif
           publish_results: true