Workaround for buildSrc:jar issue

[koppor]

At gradle/gradle#17236 (comment) I finally found a workaround for followwing gradle issue:

Execution failed for task ':buildSrc:jar'.
> Entry org/jabref/build/JournalAbbreviationConverter$_convert_closure1$_closure2.class is a duplicate but no duplicate handling strategy has been set. Please refer to https://docs.gradle.org/7.4.2/dsl/org.gradle.api.tasks.Copy.html#org.gradle.api.tasks.Copy:duplicatesStrategy for details.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

• Change in CHANGELOG.md described in a way that is understandable for the average user (if applicable)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked 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 to the documentation repository.

[Siedlerchr]

works for me