Update Java version to 25 in CI

Author: jagdish-15

.github/workflows/java.yml

@@ -17,10 +17,10 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
-      - name: Set up JDK 21
+      - name: Set up JDK 25
         uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654
         with:
-          java-version: 21
+          java-version: 25
           distribution: "temurin"
       - name: Check if tests compile cleanly with starter sources
         run: ./gradlew compileStarterTestJava --continue
@@ -34,10 +34,10 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
         with:
           fetch-depth: 0
-      - name: Set up JDK 21
+      - name: Set up JDK 25
         uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654
         with:
-          java-version: 21
+          java-version: 25
           distribution: "temurin"
       - name: Check if changed exercise tests compile cleanly
         run: bin/build-changed-exercise
@@ -48,10 +48,10 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
-      - name: Set up JDK 21
+      - name: Set up JDK 25
         uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654
         with:
-          java-version: 21
+          java-version: 25
           distribution: "temurin"
       - name: Run checkstyle
         run: ./gradlew check --exclude-task test --continue
@@ -65,10 +65,10 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
         with:
           fetch-depth: 0
-      - name: Set up JDK 21
+      - name: Set up JDK 25
         uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654
         with:
-          java-version: 21
+          java-version: 25
           distribution: "temurin"
       - name: Lint changed exercises
         run: bin/lint-changed-exercise