Correct name of basic_date_time_no_millis (#39367)

With this commit we correct the name of the Java time based formatter
for `basic_date_time_no_millis`.

server/src/main/java/org/elasticsearch/common/time/DateFormatters.java

@@ -324,7 +324,7 @@ public class DateFormatters {
      * Returns a basic formatter that combines a basic date and time without millis,
      * separated by a 'T' (yyyyMMdd'T'HHmmssZ).
      */
-    private static final DateFormatter BASIC_DATE_TIME_NO_MILLIS = new JavaDateFormatter("basic_t_time_no_millis",
+    private static final DateFormatter BASIC_DATE_TIME_NO_MILLIS = new JavaDateFormatter("basic_date_time_no_millis",
         new DateTimeFormatterBuilder().append(BASIC_DATE_T).append(BASIC_TIME_NO_MILLIS_BASE)
             .appendZoneOrOffsetId().toFormatter(Locale.ROOT),
         new DateTimeFormatterBuilder().append(BASIC_DATE_T).append(BASIC_TIME_NO_MILLIS_BASE)