Correct ISO DateTime example

Issue: SPR-14675
(cherry picked from commit d5c9cc6)

Author: jhoeller

spring-context/src/main/java/org/springframework/format/annotation/DateTimeFormat.java

@@ -104,7 +104,7 @@ enum ISO {
 
 		/**
 		 * The most common ISO DateTime Format {@code yyyy-MM-dd'T'HH:mm:ss.SSSZ},
-		 * e.g. "2000-10-31 01:30:00.000-05:00".
+		 * e.g. "2000-10-31T01:30:00.000-05:00".
 		 * <p>This is the default if no annotation value is specified.
 		 */
 		DATE_TIME,