Bump springdoc-openapi-ui from 1.6.12 to 1.6.13

Bumps [springdoc-openapi-ui](https://github.com/springdoc/springdoc-openapi) from 1.6.12 to 1.6.13.
- [Release notes](https://github.com/springdoc/springdoc-openapi/releases)
- [Changelog](https://github.com/springdoc/springdoc-openapi/blob/master/CHANGELOG.md)
- [Commits](springdoc/springdoc-openapi@v1.6.12...v1.6.13)

---
updated-dependencies:
- dependency-name: org.springdoc:springdoc-openapi-ui
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build.gradle.kts

@@ -5,7 +5,7 @@ val logstashVersion = "7.2"
 val springVersion = "2.5.5"
 val springSleuthVersion = "3.1.5"
 val testContainersVersion = "1.17.6"
-val springDocVersion = "1.6.12"
+val springDocVersion = "1.6.13"
 val tokenValidationVersion = "2.1.8"
 val problemSpringWebStartVersion = "0.27.0"