Update nextjs.yml

Author: JustDeveloper1

.github/workflows/nextjs.yml

@@ -22,7 +22,7 @@ jobs:
         uses: actions/checkout@v4
       - name: npm
         id: install-npm
-        run: npm i
+        run: npm i && npm install monaco-editor
       - name: Detect package manager
         id: detect-package-manager
         run: |