Replace deprecated 'adopt' distribution with 'temurin' in GitHub Actions

[Copilot]

The adopt distribution for actions/setup-java is deprecated and will be removed in future versions. Replaced all occurrences with temurin, the recommended successor.

Changes

• .github/workflows/javaci.yml: Updated both java-check and java-test jobs
• .github/actions/format/action.yml: Updated JDK setup step

# Before
distribution: 'adopt'

# After
distribution: 'temurin'

All other workflows already use temurin or alternative distributions (zulu for SonarCloud).

Original prompt

---

This section details on the original issue you should resolve

<issue_title>GitHub workflow: adopt distribution for actions/setup-java is deprecated </issue_title>
<issue_description>

The adopt distribution for actions/setup-java is deprecated and will be removed in a future version. It is recommended to use temurin instead, which was the value used previously. Using a deprecated value could cause this action to fail in the future.

        distribution: 'temurin'

Originally posted by @gemini-code-assist[bot] in #1721 (comment)
</issue_description>

<agent_instructions>Check all GitHub workflows</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes GitHub workflow: adopt distribution for actions/setup-java is deprecated  #1722

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