Polish contribution

See gh-36448

spring-jms/src/main/java/org/springframework/jms/support/converter/JacksonJsonMessageConverter.java

@@ -419,7 +419,7 @@ public class JacksonJsonMessageConverter implements SmartMessageConverter, BeanC
 			throws JMSException, IOException {
 
 		throw new IllegalArgumentException("Unsupported message type [" + message.getClass() +
-				"]. MappingJacksonMessageConverter by default only supports TextMessages and BytesMessages.");
+				"]. JacksonJsonMessageConverter by default only supports TextMessages and BytesMessages.");
 	}
 
 	/**

spring-jms/src/main/java/org/springframework/jms/support/converter/MappingJackson2MessageConverter.java

@@ -435,7 +435,7 @@ public class MappingJackson2MessageConverter implements SmartMessageConverter, B
 			throws JMSException, IOException {
 
 		throw new IllegalArgumentException("Unsupported message type [" + message.getClass() +
-				"]. MappingJacksonMessageConverter by default only supports TextMessages and BytesMessages.");
+				"]. MappingJackson2MessageConverter by default only supports TextMessages and BytesMessages.");
 	}
 
 	/**