Clarify JavaDoc for JMS DESTINATION_NAME (#5988)

Closes #5929

Signed-off-by: Alexey Elin <[email protected]>

Author: AlexElin

Diff for: micrometer-jakarta9/src/main/java/io/micrometer/jakarta9/instrument/jms/JmsObservationDocumentation.java

@@ -133,6 +133,10 @@ public String asString() {
 
         /**
          * The name of destination the current message was sent to.
+         * <p>
+         * The rationale for classifying it as a high-cardinality key is that
+         * {@link jakarta.jms.TemporaryQueue} has a great number of possible values of
+         * names.
          */
         DESTINATION_NAME {
             @Override