Renaming secrets (#13171)

Author: trask

.github/workflows/backport.yml

@@ -32,8 +32,8 @@ jobs:
       - uses: actions/create-github-app-token@136412a57a7081aa63c935a2cc2918f76c34f514 # v1.11.2
         id: app-token
         with:
-          app-id: ${{ secrets.OPENTELEMETRY_BASIC_AUTOMATION_APP_ID }}
-          private-key: ${{ secrets.OPENTELEMETRY_BASIC_AUTOMATION_PRIVATE_KEY }}
+          app-id: ${{ vars.OTELBOT_APP_ID }}
+          private-key: ${{ secrets.OTELBOT_PRIVATE_KEY }}
 
       - name: Create pull request
         env: