Update actions/setup-node to v4

Author: trivikr

.github/workflows/remark.yml

@@ -19,7 +19,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Setup Node.js
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: '18.x'