Bump activemq-core from 5.2.0 to 5.6.0 in /itest/jms-format

Bumps activemq-core from 5.2.0 to 5.6.0.

---
updated-dependencies:
- dependency-name: org.apache.activemq:activemq-core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/itest/jms-format/pom.xml b/itest/jms-format/pom.xml
index bc1efe9..38d4e4b 100644
--- a/itest/jms-format/pom.xml
+++ b/itest/jms-format/pom.xml
@@ -78,7 +78,7 @@
         <dependency>
             <groupId>org.apache.activemq</groupId>
             <artifactId>activemq-core</artifactId>
-            <version>5.2.0</version>
+            <version>5.6.0</version>
             <scope>runtime</scope>
         </dependency>
         <dependency>