Ensure latest JDK variant

[koppor]

Follow-up to #13749 (comment)

At https://github.com/actions/setup-java#usage

check-latest Setting this option makes the action to check for the latest available version for the version spec.

Corretto is a bit strange in their versions - and does not support specifying concrete versions. Thus is confusing. Using ´check-latest` should remove that confusion.

Mandatory checks

• I own the copyright of the code submitted and I license it under the MIT license
• [/] I manually tested my changes in running JabRef (always required)
• [/] I added JUnit tests for changes (if applicable)
• [/] I added screenshots in the PR description (if change is visible to the user)
• [/] I described the change in CHANGELOG.md in a way that is understandable for the average user (if change is visible to the user)
• [/] I checked the user documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request updating file(s) in https://github.com/JabRef/user-documentation/tree/main/en.

[trag-bot]

@trag-bot didn't find any issues in the code! ✅✨

[github-actions]

The build of this PR is available at https://builds.jabref.org/pull/13843/merge.