upgrade java version in workflows

Signed-off-by: Pranav Gaikwad <pgaikwad@redhat.com>

Author: pranavgaikwad

.github/workflows/integration-tests.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up JDK 17
         uses: actions/setup-java@v5
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
           cache: maven
 
@@ -43,7 +43,7 @@ jobs:
       - name: Set up JDK 17
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
           cache: maven