Bump org.assertj:assertj-core in /modules/mockserver

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.25.1 to 3.25.3.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.25.1...assertj-build-3.25.3)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

modules/mockserver/build.gradle

@@ -4,5 +4,5 @@ dependencies {
     api project(':testcontainers')
 
     testImplementation 'org.mock-server:mockserver-client-java:5.15.0'
-    testImplementation 'org.assertj:assertj-core:3.25.1'
+    testImplementation 'org.assertj:assertj-core:3.25.3'
 }