Upgrade maven-gpg-plugin 3.2.5 -> 3.2.6

[Picnic-DevPla-Bot]

This PR contains the following updates:

Package	Type	Update	Change
maven-gpg-plugin	build	patch	3.2.5 -> 3.2.6

---

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

[Picnic-DevPla-Bot]

Suggested commit message:

Upgrade maven-gpg-plugin 3.2.5 -> 3.2.6 (#1331)

See:
- https://github.com/apache/maven-gpg-plugin/releases/tag/maven-gpg-plugin-3.2.6
- https://github.com/apache/maven-gpg-plugin/compare/maven-gpg-plugin-3.2.5...maven-gpg-plugin-3.2.6

[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