Update release notes

docs/WHATSNEW

@@ -1,5 +1,27 @@
 CHANGES TO REMIND
 
+* VERSION 5.2 Patch 3 - 2025-??-??
+
+- NEW FEATURE: remind: Add "TRANSLATE GENERATE" command for generating
+  a skeleton set of TRANSLATE commands to make it easier to localize
+  Remind.
+
+- NEW FEATURE: remind: Add "q" debug flag for tracing calls to _()
+  or %(...) in the substitution filter; this will help with localizing
+  reminder files.
+
+- NEW FILES: remind: Add holidays/lgbtq.rem for LGBTQ holidays.  Add
+  country-specific files in holidays/lgbtq/*.rem
+
+- IMPROVEMENT: TkRemind: use "info patchlevel" to display full Tcl/Tk
+  version.
+
+- IMPROVEMENT: remind: The DEBUG command issues a warning if given an
+  unknown debug flag.
+
+- BUG FIX: remind: "make test" will now succeed even if run between
+  23:55 and 00:00 UTC.
+
 * VERSION 5.2 Patch 2 - 2025-01-06
 
 - NEW FEATURE: remind: The "-p+" option lets you produce weekly calendars;