fix: use v4 tag for setup-node in workflow

Author: snehshah22

.github/workflows/notebook-mcp-check.yml

@@ -27,7 +27,7 @@ jobs:
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       - name: Set up Node.js
-        uses: actions/setup-node@64745409647f540ba9c1a129988bd580887fb902 # v4
+        uses: actions/setup-node@v4
         with:
           node-version: '20'