doc: Update changelog

Author: munen

changelog.org

@@ -4,6 +4,13 @@ All user visible changes to organice will be documented in this file.
 
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+* [2020-11-20 Fri]
+** Fixed
+   - organice understands =:PROPERTIES:= drawers and smartly parses the values in case one of the values is a timestamp.
+     - However, parsing all the values and saving the parsed result in any case will lead to wrong results. Most values of properties are just plain text and non-interactive things in Org mode.
+     - For example, a value like =something_with_underscores= would have been treated as 'underlined text' which doesn't make sense for a property drawer. When saving the value back, organice would have squashed the underlines.
+     - Now, the values are used and preserved as they are. Timestamps still work, of course.
+     - Relevant PR: https://github.com/200ok-ch/organice/pull/578
 * [2020-11-15 Sun]
 ** Fixed
    - When repeating a task, an active date timestamp was logged instead of an inactive datetime timestamp.