Add changelog entry for PR #563 (Don't attempt to resize unmounted graphs)

Author: wbrgss

CHANGELOG.md

@@ -5,6 +5,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ## [Unreleased]
 ### Fixed
 - Fixed `min_date_allowed` and `max_date_allowed` bug in `DatePickerRange` [#551]https://github.com/plotly/dash-core-components/issues/551)
+- Fixed unwanted resize() calls on unmounted `Graph`s [#534](https://github.com/plotly/dash-core-components/issues/534)
 
 ### Changed
 - Changed `dcc.Checklist` prop `values` to `value`, to match all the other input components [#558](https://github.com/plotly/dash-core-components/pull/558). Also improved prop types for `Dropdown` and `RadioItems` `value` props to consistently accept both strings and numbers.