NEWS-only: publish date for 1.14.4 added to title; see patch-14.1 branch for tags

Author: mattdowle

NEWS.md

@@ -600,7 +600,7 @@
 15. Thanks to @ssh352, Václav Tlapák, Cole Miller, András Svraka and Toby Dylan Hocking for reporting and bisecting a significant performance regression in dev. This was fixed before release thanks to a PR by Jan Gorecki, [#5463](https://github.com/Rdatatable/data.table/pull/5463). 
 
 
-# data.table [v1.14.4](https://github.com/Rdatatable/data.table/milestone/26?closed=1)
+# data.table [v1.14.4](https://github.com/Rdatatable/data.table/milestone/26?closed=1)  (17 Oct 2022)
 
 ## NOTES