chore: update workflow to trigger trivy on specific changes

Author: mhussajn

.github/workflows/trivy-frontend.yml

@@ -11,6 +11,10 @@ on:
     branches:
       - main
       - develop
+    paths:
+      - "frontend/package.json"
+      - "frontend/yarn.lock"
+      - "frontend/Dockerfile"
 
 env:
   IMAGE_NAME: frontend