Update reviewdog config to validate only changed files

Author: omkar-foss

.github/workflows/reviewdog.yml

@@ -9,6 +9,8 @@ jobs:
         uses: actions/checkout@v4
       - name: golangci-lint
         uses: reviewdog/action-golangci-lint@v2
+        with:
+          filter_mode: file
 
       - name: Setup reviewdog
         uses: reviewdog/action-setup@v1