Bump org.assertj:assertj-core from 3.26.0 to 3.26.3 (#332)

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

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ swt = "4.5.2"
 reactorCore = { module = "io.projectreactor:reactor-core", version.ref = "reactorCore" }
 reactorTest = { module = "io.projectreactor:reactor-test", version.ref = "reactorCore" }
 akkaActor = "com.typesafe.akka:akka-actor_2.11:2.4.10"
-assertj = "org.assertj:assertj-core:3.26.0"
+assertj = "org.assertj:assertj-core:3.26.3"
 hamcrest = "org.hamcrest:hamcrest-library:2.2"
 jsr305 = "com.google.code.findbugs:jsr305:3.0.1"
 junit4 = "junit:junit:4.13.2"