Bump org.assertj:assertj-core from 3.27.3 to 3.27.6

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.27.3 to 3.27.6.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.27.3...assertj-build-3.27.6)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-version: 3.27.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

htmlSanityCheck-maven-plugin/build.gradle

@@ -18,7 +18,7 @@ dependencies {
     testImplementation libs.junit.jupiter
     testRuntimeOnly "org.junit.platform:junit-platform-launcher:1.12.2"
     // Explicit Launcher Version to override Gradle default
-    testImplementation 'org.assertj:assertj-core:3.27.3'
+    testImplementation 'org.assertj:assertj-core:3.27.6'
 }
 
 test {