[Changelog] Added latest changes

Author: wpferguson

ChangeLog.md

@@ -1,5 +1,9 @@
 ## Changes from most recent to oldest
 
+** 19 Mar 2021 - wpferguson - fixed crash in contrib/HDRmerge.lua**
+* Made generated filename routine gracefully handle names that
+are not in the exported format.
+
 ** 25 Feb 2021 - wpferguson - added detached mode to contrib/gimp.lua**
 
 * Added run_detached checkbox to the exporter GUI.  Selecting run_detached
@@ -54,4 +58,4 @@ of it's row number in the database
 **7 Jan 2021 - dtorop - add contrib/fujifilm_dynamic_range**
 
 * add a new contrib script, fujifilm_dynamic_range to adjust exposure
-based on the exposure bias camera setting
+based on the exposure bias camera setting