Update frontend-ci.yml

.github/workflows/frontend-ci.yml

@@ -15,18 +15,12 @@ jobs:
     defaults:
       run:
         working-directory: frontend
-    strategy:
-      matrix:
-        node-version: [18.x]
-        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
-
     steps:
     - uses: actions/checkout@v4
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v3
       with:
-        node-version: ${{ matrix.node-version }}
-        cache: 'npm'
+        node-version: 18.x
     - run: npm ci
     - run: npm run build --if-present
     - run: npm test