Update md-link-check.yml

Author: Pnwcomputers

.github/workflows/md-link-check.yml

@@ -16,9 +16,9 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Setup Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20'
 
       - name: Install markdown-link-check
         run: npm install -g markdown-link-check