Skip running gradle checks on release notes (opensearch-project#13477)

Signed-off-by: Sayali Gaikawad <[email protected]>

.github/workflows/gradle-check.yml

@@ -7,6 +7,10 @@ on:
       - 'dependabot/**'
   pull_request_target:
     types: [opened, synchronize, reopened]
+    paths-ignore:
+      - 'release-notes/**'
+      - '.github/**'
+      - '**.md'
 
 permissions:
   contents: read # to fetch code (actions/checkout)