doc: fix typo in changelog

Author: Nexeuz

CHANGELOG.md

@@ -5,7 +5,7 @@
 ### Bug Fixes
 
 * **a11y:** not being able to escape disabled focus trap using arrow keys ([#13133](https://github.com/angular/material2/issues/13133)) ([3c55caa](https://github.com/angular/material2/commit/3c55caa)), closes [#13132](https://github.com/angular/material2/issues/13132)
-* **autocomplete:** closing parent overlay when pressing escpe ([#13413](https://github.com/angular/material2/issues/13413)) ([8dfd2ee](https://github.com/angular/material2/commit/8dfd2ee))
+* **autocomplete:** closing parent overlay when pressing escape (Esc) ([#13413](https://github.com/angular/material2/issues/13413)) ([8dfd2ee](https://github.com/angular/material2/commit/8dfd2ee))
 * **bottom-sheet:** dismiss bottom sheet on destroy ([#13120](https://github.com/angular/material2/issues/13120)) ([ffa4a06](https://github.com/angular/material2/commit/ffa4a06))
 * **button-toggle:** not setting proper border in vertical mode ([#13397](https://github.com/angular/material2/issues/13397)) ([d58db5d](https://github.com/angular/material2/commit/d58db5d))
 * **button-toggle:** remove extra focus indication added by firefox ([#13367](https://github.com/angular/material2/issues/13367)) ([3583913](https://github.com/angular/material2/commit/3583913))