fix(ci): remove alert comment from benchmark workflow

Signed-off-by: Swapnanil-Gupta <swpnlg@amazon.com>

Author: Swapnanil-Gupta

.github/workflows/benchmark.yaml

@@ -2,6 +2,9 @@
 # - When a job is added/removed/renamed, please make corresponding changes in ci-docs.yaml.
 name: Benchmark
 on:
+  pull_request:
+    branches:
+      main
   push:
     branches:
       - main
@@ -69,9 +72,5 @@ jobs:
           tool: 'go'
           benchmark-data-dir-path: "dev/bench/macOS/${{ env.OS_VERSION }}/${{ env.ARCH }}"
           output-file-path: benchmark.txt
-          alert-threshold: "200%"
-          fail-on-alert: true
-          comment-on-alert: true
-          alert-comment-cc-users: '@runfinch/maintainers'
       - name: Push benchmark result
         run: git push 'https://github.com/runfinch/finch.git' gh-pages:gh-pages