Bump org.apache.activemq:activemq-client in /modules/activemq

Bumps [org.apache.activemq:activemq-client](https://github.com/apache/activemq) from 6.1.7 to 6.1.8.
- [Commits](apache/activemq@activemq-6.1.7...activemq-6.1.8)

---
updated-dependencies:
- dependency-name: org.apache.activemq:activemq-client
  dependency-version: 6.1.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

modules/activemq/build.gradle

@@ -3,6 +3,6 @@ description = "Testcontainers :: ActiveMQ"
 dependencies {
     api project(':testcontainers')
 
-    testImplementation "org.apache.activemq:activemq-client:6.1.7"
+    testImplementation "org.apache.activemq:activemq-client:6.1.8"
     testImplementation "org.apache.activemq:artemis-jakarta-client:2.42.0"
 }