Bump springdoc-openapi-ui from 1.6.11 to 1.6.12

Bumps [springdoc-openapi-ui](https://github.com/springdoc/springdoc-openapi) from 1.6.11 to 1.6.12.
- [Release notes](https://github.com/springdoc/springdoc-openapi/releases)
- [Changelog](https://github.com/springdoc/springdoc-openapi/blob/master/CHANGELOG.md)
- [Commits](springdoc/springdoc-openapi@v1.6.11...v1.6.12)

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

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle

@@ -238,7 +238,7 @@ dependencies {
     contractTestImplementation sourceSets.main.runtimeClasspath
     contractTestImplementation sourceSets.test.runtimeClasspath
 
-    implementation group: 'org.springdoc', name: 'springdoc-openapi-ui', version: '1.6.11'
+    implementation group: 'org.springdoc', name: 'springdoc-openapi-ui', version: '1.6.12'
 }
 
 dependencyCheck {