chore(deps): update actions/setup-node action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -11,5 +11,5 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-node@v2.5.2
+    - uses: actions/setup-node@v4.0.1
     - run: npm cit

.github/workflows/gh-pages.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     # build
-    - uses: actions/setup-node@v2.5.2
+    - uses: actions/setup-node@v4.0.1
     - run: npm ci
     - run: npm run build
     # deploy