fix: properly name benchmark

Author: fkrause98

.github/workflows/pr_build_block_bench.yml

@@ -24,6 +24,6 @@ jobs:
         uses: boa-dev/criterion-compare-action@v3
         with:
           cwd: "cmd/ethrex/bench"
-          benchName: "build_block"
+          benchName: "build_block_benchmark"
           branchName: ${{ github.base_ref }}
           token: ${{ secrets.GITHUB_TOKEN }}