chore(ci): only lint when action changed (#9678)

Author: noahdietz

.github/workflows/action_syntax.yml

@@ -1,5 +1,9 @@
 name: action_syntax
-on: [pull_request]
+on:
+  pull_request:
+    paths:
+    - '.github/workflows/*.yaml'
+    - '.github/workflows/*.yml'
 
 permissions:
   contents: read