cicd: use node 20

Author: rl404

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Install Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           cache: npm
       - name: Install dependencies
         run: npm install