fix changelog formatting

Author: wpferguson

ChangeLog.md

@@ -1,11 +1,17 @@
 ## Changes from most recent to oldest
+
 **12 Jan 2022 - wpferguson - Documented contrib/rename_images.lua**
+
 **28 Dec 2021 - wpferguson - Replaced deprecated _which_ command with _command -v_ in lib/dtutils/file.lua**
+
 **12 Dec 2021 - wpferguson**
 * Added deprecated function to library
 * Added deprecation warning to contrib/rename-tags.lua
+
 **22 Oct 2021 - wpferguson for Volker Bödker - make sure sequence is 4 digits in rename_images.lua**
+
 **31 Aug 2021 - wpferguson - remove styles hiding from AutoGrouper.lua**
+
 **02 Jul 2021 - wpferguson - merged API-7.0.0-dev branch to master**
 * API-7.0.0 is darktable 3.6
 * breaking changes