Update CHANGELOG and history

Author: mmistakes

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ### Enhancements
 
-- Update GreedyNav.js
+- Update GreedyNav.js to reduce masthead link overflow/shifting on mobile devices. [#2551](https://github.com/mmistakes/minimal-mistakes/issues/2551)
 - Replace `<section id="custom-comments"></section>` in `comments.html` include and add `custom_scripts.html` include for loading custom comment provider JavaScript in the footer. [#2549](https://github.com/mmistakes/minimal-mistakes/issues/2549)
 - Move page date Liquid to include. [#2544](https://github.com/mmistakes/minimal-mistakes/pull/2544)
 - Strip trailing whitespace in seo_description. [#2542](https://github.com/mmistakes/minimal-mistakes/pull/2542)

docs/_docs/18-history.md

@@ -5,15 +5,15 @@ permalink: /docs/history/
 excerpt: "Change log of enhancements and bug fixes made to the theme."
 sidebar:
   nav: docs
-last_modified_at: 2020-06-06T10:30:36-04:00
+last_modified_at: 2020-06-06T10:39:18-04:00
 toc: false
 ---
 
 ## Unreleased
 
 ### Enhancements
 
-- Update GreedyNav.js
+- Update GreedyNav.js to reduce masthead link overflow/shifting on mobile devices. [#2551](https://github.com/mmistakes/minimal-mistakes/issues/2551)
 - Replace `<section id="custom-comments"></section>` in `comments.html` include and add `custom_scripts.html` include for loading custom comment provider JavaScript in the footer. [#2549](https://github.com/mmistakes/minimal-mistakes/issues/2549)
 - Move page date Liquid to include. [#2544](https://github.com/mmistakes/minimal-mistakes/pull/2544)
 - Strip trailing whitespace in `seo_description`. [#2542](https://github.com/mmistakes/minimal-mistakes/pull/2542)