CI: update build.yml for different version

Author: fqd511

.github/workflows/build.yml

@@ -21,12 +21,12 @@ jobs:
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 6.15.1
+          version: latest
 
-      - name: Use Node.js 20.x
+      - name: Use Node.js 18.x
         uses: actions/setup-node@v4
         with:
-          node-version: 20.x
+          node-version: 18.x
           registry-url: https://registry.npmjs.org/
           cache: "pnpm"