github: workflows: restricted AArch64 CI to relevant changes

.github/workflows/ci-aarch64.yml

@@ -21,8 +21,29 @@ name: "CI AArch64"
 #* https://github.com/orgs/community/discussions/26940#discussioncomment-5686753
 on:
   push:
+    branches: [ main, 'rls-*' ]
+    paths:
+      - '.github/**'
+      - 'cmake/**'
+      - 'examples/**
+      - 'include/**'
+      - 'src/cpu/*'
+      - 'src/cpu/common/**'
+      - 'src/cpu/aarch64/**'
+      - 'tests/**'
+      - 'CMakeLists.txt'
   pull_request:
     types: [opened, synchronize, reopened]
+    paths:
+      - '.github/**'
+      - 'cmake/**'
+      - 'examples/**
+      - 'include/**'
+      - 'src/cpu/*'
+      - 'src/cpu/common/**'
+      - 'src/cpu/aarch64/**'
+      - 'tests/**'
+      - 'CMakeLists.txt'
 
 #* Stop stale workflows when pull requests are updated: https://stackoverflow.com/a/70972844
 #* Does not apply to the main branch.