Bump org.testcontainers:rabbitmq from 1.20.1 to 1.20.4

Bumps [org.testcontainers:rabbitmq](https://github.com/testcontainers/testcontainers-java) from 1.20.1 to 1.20.4.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.20.1...1.20.4)

---
updated-dependencies:
- dependency-name: org.testcontainers:rabbitmq
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

test/rainbowgum-test-rabbitmq/pom.xml

@@ -26,7 +26,7 @@
     <dependency>
       <groupId>org.testcontainers</groupId>
       <artifactId>rabbitmq</artifactId>
-      <version>1.20.1</version>
+      <version>1.20.4</version>
       <scope>test</scope>
     </dependency>
   </dependencies>