Change JDK from 17 to 21

# TODO
- details for request specific requests
- sm/smea dyn functionality
- Builder for requests

Signed-off-by: zhaoxinn <[email protected]>

Author: zxzinn

.github/workflows/maven.yml

@@ -21,10 +21,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: Set up JDK 17
+    - name: Set up JDK 21
       uses: actions/setup-java@v4
       with:
-        java-version: '17'
+        java-version: '21'
         distribution: 'temurin'
         cache: maven
     - name: Build with Maven