Wrap benchmark results in collapsible details

Author: xHeaven

.github/workflows/benchmark-comment.yml

@@ -56,6 +56,11 @@ jobs:
 
             Comparison of `${{ steps.bench.outputs.head-ref }}` against `${{ steps.bench.outputs.base-ref }}` (`${{ steps.bench.outputs.base-sha }}`).
 
+            <details>
+              <summary>Open to see the benchmark results</summary>
+
             ${{ steps.bench.outputs.result }}
 
+            </details>
+
             <sub>Generated by phpbench against commit ${{ steps.bench.outputs.head-sha }}</sub>