ci: upgrade tests to JDK 25 (googleapis#2119)

Author: mpeddada1

.github/workflows/ci.yaml

@@ -25,7 +25,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [8, 11, 17, 24]
+        java: [8, 11, 17, 25]
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-java@v4
@@ -54,7 +54,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [8, 11, 17, 24]
+        java: [8, 11, 17, 25]
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-java@v4
@@ -110,4 +110,4 @@ jobs:
         distribution: temurin
     - run: .kokoro/build.sh
       env:
-        JOB_TYPE: test
+        JOB_TYPE: test