Skip running gradle checks on release notes (#13477) (#13482)

(cherry picked from commit 1765e20)

Signed-off-by: Sayali Gaikawad <gaiksaya@amazon.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: opensearch-trigger-bot[bot]

.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)