Bump org.assertj:assertj-core from 3.26.0 to 3.26.3 (#6277)

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.26.0 to 3.26.3.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.26.0...assertj-build-3.26.3)

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

gradle/libs.versions.toml

@@ -41,7 +41,7 @@ zipkinReporterVersion = "3.4.0"
 nettyVersion = "4.1.112.Final"
 
 # Testing
-assertjVersion = "3.26.0"
+assertjVersion = "3.26.3"
 junitVersion = "5.10.3"
 junitPlatformVersion = "1.10.3"
 mockitoVersion = "5.12.0"