Fix typo in changelog

Author: Jokinen

CHANGELOG.md

@@ -14,7 +14,7 @@
 ### Fixed
 
 - [#142](https://github.com/City-of-Helsinki/kukkuu-admin/pull/142) Missing labels in venue and event detail views
-- [#144](https://github.com/City-of-Helsinki/kukkuu-admin/pull/144) Slow update od event and event group list by using confirmation pattern instead of undo pattern when deleting events
+- [#144](https://github.com/City-of-Helsinki/kukkuu-admin/pull/144) Slow update of event and event group list by using confirmation pattern instead of undo pattern when deleting events
 - [#147](https://github.com/City-of-Helsinki/kukkuu-admin/pull/147) Occurrence view crash on reload
 - [#151](https://github.com/City-of-Helsinki/kukkuu-admin/pull/151) Crashing venue editing field when re-entering after a successful edit
 - [#140](https://github.com/City-of-Helsinki/kukkuu-admin/pull/140), [#145](https://github.com/City-of-Helsinki/kukkuu-admin/pull/145) Event editing leading to an error when user set a non-required string value as empty