ci: update Node.js setup action to version 6

Author: OliverDudgeon

.github/workflows/release.yml

@@ -33,7 +33,7 @@ jobs:
           run_install: false
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 22.21.1
           cache: pnpm