Update changelog

Author: adamwathan

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Support disabling dark mode variants globally ([#2530](https://github.com/tailwindlabs/tailwindcss/pull/2530))
 - Add new utilities for `grid-auto-columns` and `grid-auto-rows` ([#2531](https://github.com/tailwindlabs/tailwindcss/pull/2531))
 - Rename `{u}-max-content` and `{u}-min-content` utilities to `{u}-max` and `{u}-min` in experimental extended spacing scale ([#2532](https://github.com/tailwindlabs/tailwindcss/pull/2532))
+- Use `word-wrap` instead of `overflow-wrap` in `ie11` target mode ([#2391](https://github.com/tailwindlabs/tailwindcss/pull/2391))
 
 ## [1.8.13] - 2020-10-09