chore: update PR branch trigger condition

Author: magentaqin

.github/workflows/benchmark.yml

@@ -3,11 +3,12 @@ name: CodSpeed
 on:
   push:
     branches:
-      - "feature/codespeed" # or "master"
-  pull_request: # required to have reports on PRs
-  # `workflow_dispatch` allows CodSpeed to trigger backtest
-  # performance analysis in order to generate initial data.
-  workflow_dispatch:
+      - "feature/codespeed"
+  pull_request:
+    types: [opened, synchronize, closed]
+    branches:
+      - main
+      - "feature/codespeed"
 
 jobs:
   benchmarks: