build(deps): bump the gradle-updates group with 2 updates

Bumps the gradle-updates group with 2 updates: org.openapi.generator and [org.mockito:mockito-core](https://github.com/mockito/mockito).


Updates `org.openapi.generator` from 7.11.0 to 7.12.0

Updates `org.mockito:mockito-core` from 5.15.2 to 5.16.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.15.2...v5.16.0)

---
updated-dependencies:
- dependency-name: org.openapi.generator
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle-updates
- dependency-name: org.mockito:mockito-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle-updates
...

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

data-api/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id 'org.openapi.generator' version '7.11.0'
+    id 'org.openapi.generator' version '7.12.0'
 }
 
 apply plugin: 'uk.gov.laa.ccms.springboot.laa-ccms-spring-boot-gradle-plugin'

data-service/build.gradle

@@ -23,7 +23,7 @@ dependencies {
     implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-xml'
 
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
-    testImplementation 'org.mockito:mockito-core:5.15.2'
+    testImplementation 'org.mockito:mockito-core:5.16.0'
     testImplementation 'org.junit.jupiter:junit-jupiter:5.12.0'
 
     //Used for integration tests