Bump org.assertj:assertj-core from 3.25.3 to 3.27.6

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.25.3 to 3.27.6.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.25.3...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-minor
...

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

Author: dependabot[bot]

build.gradle

@@ -24,7 +24,7 @@ dependencies {
     implementation "com.fasterxml.jackson.datatype:jackson-datatype-jdk8:$jacksonVersion"
     implementation 'com.github.javaparser:javaparser-core:3.27.0'
 
-    implementation 'org.assertj:assertj-core:3.25.3'
+    implementation 'org.assertj:assertj-core:3.27.6'
     implementation 'org.apiguardian:apiguardian-api:1.1.2' // https://github.com/exercism/java-test-runner/issues/79
     implementation platform('org.junit:junit-bom:5.11.3')
     implementation 'org.junit.jupiter:junit-jupiter'