Update plugin com.github.spotbugs to v6.0.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.github.spotbugs	6.0.2 -> 6.0.4

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[!WARNING] Some dependencies could not be looked up. Check the warning logs for more information.

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Configuration

📅 Schedule: Branch creation - "every weekend" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (39d56c7) 92.63% compared to head (9109260) 92.63%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #535 +/- ## ========================================= Coverage 92.63% 92.63% Complexity 248 248 ========================================= Files 24 24 Lines 869 869 Branches 39 39 ========================================= Hits 805 805 Misses 43 43 Partials 21 21 ```

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