Add a missing word to the Tree label entry in the ChangeLog (#2797)

Author: davep

CHANGELOG.md

@@ -21,7 +21,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Fixed
 
-- Fixed setting `TreeNode.label` on an existing `Tree` node not immediately https://github.com/Textualize/textual/pull/2713
+- Fixed setting `TreeNode.label` on an existing `Tree` node not immediately refreshing https://github.com/Textualize/textual/pull/2713
 - Correctly implement `__eq__` protocol in DataTable https://github.com/Textualize/textual/pull/2705
 - Fixed exceptions in Pilot tests being silently ignored https://github.com/Textualize/textual/pull/2754
 - Fixed issue where internal data of `OptionList` could be invalid for short window after `clear_options` https://github.com/Textualize/textual/pull/2754