Update GitHub Actions workflow to include JDK setup and cache configuration

Author: teetangh

.github/workflows/tests.yaml

@@ -20,15 +20,15 @@ jobs:
         run: |
           apt update || echo "apt-update failed" # && apt -y upgrade
 
+      - name: Checkout ${{ github.event.repository.name }}
+        uses: actions/checkout@v4
+
       - name: Set up JDK ${{ matrix.java-version }}
         uses: actions/setup-java@v4
         with:
           java-version: ${{ matrix.java-version }}
           distribution: "adopt"
-          cache: gradle
-
-      - name: Checkout ${{ github.event.repository.name }}
-        uses: actions/checkout@v4
+          cache: "gradle"
 
       - name: Setup couchbase
         run: |