Add missing chagelog entry for last commit.

2021-10-15 15:03:26 +02:00 · 2021-10-15 15:03:26 +02:00 · f5632be462
commit f5632be462
--- a/CHANGES.rst
+++ b/CHANGES.rst
@ -18,6 +18,11 @@ Bug fixes:
 - Fix vCategories for correct en/de coding.
  [thet]

+- vDuration property value: Fix changing duration sign after multiple ``to_ical`` calls.
+  Ref: #320
+  Fixes: #319
+  [barlik]
+

 4.0.8 (2021-10-07)
 ------------------