CHANGES: Add a change backported to 4.99

[skip ci]

Author: fxlb

CHANGES

@@ -98,6 +98,7 @@ DayOfTheWeek, Month DD, YYYY / The Tcpdump Group
       Warn that options -A, -x[x] and -X[X] are mutually exclusive.
     Source code:
       Fix '-tt' option printing when time > 2106-02-07T06:28:15Z.
+      Add sub-second packet timestamp checks for invalid micro/nano.
       Remove unused missing/snprintf.c.
     Windows:
       Fixed to find wpcap.dll if WinPcap isn't installed and Npcap was