Update dependency org.springdoc:springdoc-openapi-starter-webmvc-ui to v2.8.8 (#15)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

build.gradle

@@ -215,7 +215,7 @@ dependencies {
   implementation 'org.springframework.boot:spring-boot-starter-actuator'
   implementation 'org.springframework.boot:spring-boot-starter-aop'
   implementation 'org.springframework.boot:spring-boot-starter-json'
-  implementation group: 'org.springdoc', name: 'springdoc-openapi-starter-webmvc-ui', version: '2.8.6'
+  implementation group: 'org.springdoc', name: 'springdoc-openapi-starter-webmvc-ui', version: '2.8.8'
 
   implementation group: 'com.github.hmcts.java-logging', name: 'logging', version: '6.1.8'