ci(workflows): limit workflow triggers to main.yaml only

- Restricts push and pull request triggers to changes in main.yaml.
- Reduces unnecessary workflow runs for modifications outside of this file.

Author: winromulus

.github/workflows/main.yaml

@@ -4,11 +4,11 @@ on:
   push:
     paths:
       - "src/**"
-      - ".github/workflows/**"
+      - ".github/workflows/main.yaml"
   pull_request:
     paths:
       - "src/**"
-      - ".github/workflows/**"
+      - ".github/workflows/main.yaml"
 
 env:
   version: 9.0.${{github.run_number}}