Skip uploading benchmark metrics when credentials aren't available

.github/workflows/benchmark.yml

@@ -51,14 +51,17 @@ jobs:
         run: bundle exec rake benchmark:run
 
       - name: Configure AWS credentials
+        if: github.repository == 'aws/aws-sdk-ruby'
         uses: aws-actions/configure-aws-credentials@v4
         with:
           role-to-assume: arn:aws:iam::373952703873:role/BenchmarkReporter
           role-session-name: benchmark-reporter
           aws-region: us-east-1
 
       - name: Upload benchmark report
+        if: github.repository == 'aws/aws-sdk-ruby'
         run: bundle exec rake benchmark:upload-report
 
       - name: Put benchmark metrics
+        if: github.repository == 'aws/aws-sdk-ruby'
         run: bundle exec rake benchmark:put-metrics