[master] Added ChangeLog entry 1249 for #5247.

ChangeLog

@@ -1,3 +1,9 @@
+1249.	[bug]		tmark
+	The assigned lease statistics were not being probably adjusted
+	by either kea-dhcp4 or kea-dhcp6 when reclaimed expired leases
+	were reissued.
+	(Trac #5247 git 4e5193fb32b14325ccf5824614e58bcceb3e6388)
+
 1248.	[bug]		marcin
 	Improved socket connection handling code, corrected numerous
 	failing and crashing tests for libkea-asiolink, libkea-http