ci: update output file name in benchmark_compare.yml

Author: ajay-mk

.github/workflows/benchmark_compare.yml

@@ -128,7 +128,7 @@ jobs:
             const path = require('path');
 
             const prData = ${{ steps.pr.outputs.result }};
-            const comparisonFile = `${prData.base_sha}-${prData.head_sha}-comparison.txt`;
+            const comparisonFile = `benchmark-comparison.txt`;
             const comparisonPath = path.join('${{ github.workspace }}', comparisonFile);
 
             let comparisonResults = '';