ci: upgrade tests to JDK 25 (#2607)

Author: mpeddada1

.github/workflows/ci.yaml

@@ -117,15 +117,15 @@ jobs:
       - run: .kokoro/build.sh
         env:
           JOB_TYPE: test
-  units-java24:
+  units-java25:
     # Building using Java 8 and run the tests with Java 24 runtime
-    name: "units (24)"
+    name: "units (25)"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-java@v3
         with:
-          java-version: 24
+          java-version: 25
           distribution: temurin
       - name: "Set jvm system property environment variable for surefire plugin (unit tests)"
         # Maven surefire plugin (unit tests) allows us to specify JVM to run the tests.