Update java to 21 in cypress test

Signed-off-by: Darshit Chanpura <dchanp@amazon.com>

Author: DarshitChanpura

.github/workflows/cypress-test-resource-sharing-enabled-e2e.yml

@@ -22,6 +22,12 @@ jobs:
       - name: Checkout Branch
         uses: actions/checkout@v5
 
+      - name: Set up JDK 21 for build
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '21'
+
       - name: Set env
         run: |
           opensearch_version=$(node -p "require('./package.json').opensearchDashboards.version")