8311968: Clarify Three-letter time zone IDs in java.util.TimeZone

Reviewed-by: naoto, lancea

src/java.base/share/classes/java/util/TimeZone.java

@@ -130,8 +130,8 @@ import sun.util.locale.provider.TimeZoneNameUtility;
  * use is deprecated</strong> because the same abbreviation is often used
  * for multiple time zones (for example, "CST" could be U.S. "Central Standard
  * Time" and "China Standard Time"), and the Java platform can then only
- * recognize one of them.
- *
+ * recognize one of them. The full list of deprecated three-letter time
+ * zone IDs and their mappings can be viewed at {@link java.time.ZoneId#SHORT_IDS}.
  *
  * @see          Calendar
  * @see          GregorianCalendar