Bump activemq-core from 5.4.2 to 5.6.0 in /spring-boot-jms-javaconfig#4

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dependabot/maven/spring-boot-jms-javaconfig/org.apache.activemq-activemq-core-5.6.0joedayz/spring-boot-samples:dependabot/maven/spring-boot-jms-javaconfig/org.apache.activemq-activemq-core-5.6.0Copy head branch name to clipboard