chore(deps): update eclipse-temurin docker tag to v25

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
eclipse-temurin	final	major	21.0.10_7-jdk-alpine → 25.0.3_9-jdk-alpine

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[dpebot]

/gcbrun

[gemini-code-assist]

Code Review

This pull request updates the base Docker images for both the Gradle and Maven examples from JDK 21 to JDK 25. Feedback was provided regarding a version mismatch between the new runtime images and the existing build environments defined in the cloudbuild.yaml files; it is recommended to synchronize these versions to ensure consistency across the build and runtime stages.

[gemini-code-assist]

Updating the runtime image to JDK 25 while the build environment in gradle-example/cloudbuild.yaml (lines 17 and 20) remains on JDK 21 (gradle:8-jdk21) creates a version mismatch. It is recommended to synchronize the build and runtime environments to ensure consistency and to allow the project to leverage features of the newer JDK.

[gemini-code-assist]

Updating the runtime image to JDK 25 while the build environment in maven-example/cloudbuild.yaml (lines 16 and 19) remains on JDK 21 (maven:3-eclipse-temurin-21-alpine) creates a version mismatch. It is recommended to synchronize the build and runtime environments to ensure consistency and to allow the project to leverage features of the newer JDK.

[dpebot]

/gcbrun