fix(mcserver): update Ubuntu 24.04 Java dependency to OpenJDK 25

[Huguiz]

Description

This PR updates the Ubuntu 24.04 dependency mapping for mcserver to use OpenJDK 25.

Minecraft now requires a newer Java version (25), and the current Ubuntu 24.04 mapping does not provide the required runtime for mcserver (21).

This PR intentionally keeps the scope small:

• Ubuntu 24.04 only
• mcserver only
• no changes to other distros

Fixes #4889

Type of change

• Bug fix (a change which fixes an issue).
• New feature (a change which adds functionality).
• New Server (new server added).
• Refactor (restructures existing code).
• Comment update (typo, spelling, explanation, examples, etc).

Checklist

• This pull request links to an issue.
• This pull request uses the develop branch as its base.
• This pull request subject follows the Conventional Commits standard.
• This code follows the style guidelines of this project.
• I have performed a self-review of my code.
• I have checked that this code is commented where required.
• I have provided a detailed enough description of this PR.
• I have checked if documentation needs updating.

Documentation

No documentation update is required for this dependency mapping change.