Bump org.assertj:assertj-core from 3.26.0 to 3.27.4 (#536)

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.26.0 to 3.27.4.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.26.0...assertj-build-3.27.4)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-version: 3.27.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [libraries]
-  assertj = 'org.assertj:assertj-core:3.26.0'
+  assertj = 'org.assertj:assertj-core:3.27.4'
   aws-lambda-core = 'com.amazonaws:aws-lambda-java-core:1.2.3'
   aws-lambda-events = 'com.amazonaws:aws-lambda-java-events:3.11.5'
   google-findbugs-jsr305 = 'com.google.code.findbugs:jsr305:3.0.2'