Use actuated runner to run benchmark (#5635)

Part of #4537

Changes:
- Against every commit on the main branch.
- Use actuated runner `actuated-arm64-4cpu-4gb` for benchmark.

.github/workflows/benchmark.yml

@@ -1,16 +1,16 @@
 name: Benchmark
 on:
   push:
-    tags:
-      - v1.* 
+    branches:
+      - main
   workflow_dispatch: 
 
 env:
   DEFAULT_GO_VERSION: "~1.22.5"
 jobs:
   benchmark:
     name: Benchmarks
-    runs-on: ubuntu-latest
+    runs-on: actuated-arm64-4cpu-4gb
     timeout-minutes: 15
     steps:
       - uses: actions/checkout@v4