Merge pull request #634 from serenity-js/renovate/actions-setup-node-6.x

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

Author: jan-molak

.github/workflows/main.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: '22.21.1'
       - uses: actions/setup-java@v5