ci: update JDK version to 24 in maven workflow

Author: lzwjava

.github/workflows/maven.yml

@@ -20,11 +20,11 @@ jobs:
       # Checkout the repository
       - uses: actions/checkout@v4
 
-      # Set up JDK 21
-      - name: Set up JDK 21
+      # Set up JDK 24
+      - name: Set up JDK 24
         uses: actions/setup-java@v4
         with:
-          java-version: '21'
+          java-version: '24'
           distribution: 'temurin'
           cache: maven
           cache-dependency-path: pom.xml