HHH-16633 improve jdoc for query methods

Author: gavinking

tooling/metamodel-generator/src/main/java/org/hibernate/jpamodelgen/annotation/QueryMethod.java

@@ -239,6 +239,11 @@ private List<String> parameterTypes() {
 	private void comment(StringBuilder declaration) {
 		declaration
 				.append("\n/**");
+		declaration
+				.append("\n * Execute the query {@value #")
+				.append(getConstantName())
+				.append("}.")
+				.append("\n *");
 		see( declaration );
 		declaration
 				.append("\n **/\n");