Upgrade SLF4J 2.0.13 -> 2.0.15

[Picnic-DevPla-Bot]

This PR contains the following updates:

Package	Type	Update	Change
SLF4J (source)	import	patch	2.0.13 -> 2.0.15

---

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

[Picnic-DevPla-Bot]

Suggested commit message:

Upgrade SLF4J 2.0.13 -> 2.0.15 (#1272)

See:
- https://www.slf4j.org/news.html
- https://github.com/qos-ch/slf4j/compare/v_2.0.13...v_2.0.15

[github-actions]

Looks good. No mutations were possible for these changes.
Mutation testing report by Pitest. Review any surviving mutants by inspecting the line comments under Files changed.

[Stephan202]

Updated the suggested commit message. Filed qos-ch/slf4j#420 to flag the missing tag.

[github-actions]

Looks good. No mutations were possible for these changes.
Mutation testing report by Pitest. Review any surviving mutants by inspecting the line comments under Files changed.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

Looks good. No mutations were possible for these changes.
Mutation testing report by Pitest. Review any surviving mutants by inspecting the line comments under Files changed.

[rickie]

Nice that you filed an issue @Stephan202 👍🏻