Update main_wecare4u.yml

.github/workflows/main_wecare4u.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Node.js version
         uses: actions/setup-node@v3
         with:
-          node-version: '20'
+          node-version: '18'
 
       - name: npm install, build, and test
         run: |