chore(deps-dev): bump org.assertj:assertj-core in /rabbitmq (#2221)

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.25.3 to 3.26.0.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.25.3...assertj-build-3.26.0)

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

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

rabbitmq/pom.xml

@@ -21,7 +21,7 @@
         <!-- dependencies -->
         <quarkus.version>3.11.0.CR1</quarkus.version>
         <lombok.version>1.18.32</lombok.version>
-        <assertj.version>3.25.3</assertj.version>
+        <assertj.version>3.26.0</assertj.version>
         <awaitility.version>4.2.1</awaitility.version>
 
         <skipITs>true</skipITs>