Bump org.springdoc:springdoc-openapi-ui from 1.6.9 to 1.6.15

Bumps [org.springdoc:springdoc-openapi-ui](https://github.com/springdoc/springdoc-openapi) from 1.6.9 to 1.6.15.
- [Release notes](https://github.com/springdoc/springdoc-openapi/releases)
- [Changelog](https://github.com/springdoc/springdoc-openapi/blob/master/CHANGELOG.md)
- [Commits](springdoc/springdoc-openapi@v1.6.9...v1.6.15)

---
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

@@ -16,7 +16,7 @@ dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-data-couchbase'
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 
-  implementation 'org.springdoc:springdoc-openapi-ui:1.6.9'
+  implementation 'org.springdoc:springdoc-openapi-ui:1.6.15'
 
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }