Fix type in changelog.md

Author: rmarren1

CHANGELOG.md

@@ -7,7 +7,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ## [0.12.0] - 2018-06-01
 ### Changed
 - `dash_html_components/__init__.py` now imports from python class files rather than generating classes at runtime,
-adding support for IDE autocomplete ect.
+adding support for IDE auto complete etc.
 
 ## [0.11.0] - 2018-06-01
 ### Added