chore(deps): update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -152,7 +152,7 @@ jobs:
         uses: gradle/wrapper-validation-action@v3
 
       - name: Set up Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version-file: '.nvmrc'