chore(deps): update actions/setup-node action to v3.9.1

Author: renovate[bot]

.github/workflows/buildtest.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3.0.2
-    - uses: actions/setup-node@v3.4.1
+    - uses: actions/setup-node@v3.9.1
       with:
          node-version: '18.x'
     - name: use node