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

Author: renovate[bot]

.github/workflows/release-pr.yml

@@ -18,7 +18,7 @@ jobs:
           fetch-depth: 0
 
       - name: Setup Node.js 22.x
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 22.x