Add reference to Thai UI text strings

docs/_docs/08-ui-text.md

@@ -30,6 +30,7 @@ The English[^yaml-anchors] main keys in [`_data/ui-text.yml`](https://github.com
 - Slovak
 - Spanish (Español)
 - Swedish
+- Thai
 - Turkish (Türkçe)
 - Vietnamese
 

docs/_docs/18-history.md

@@ -5,7 +5,7 @@ permalink: /docs/history/
 excerpt: "Change log of enhancements and bug fixes made to the theme."
 sidebar:
   nav: docs
-last_modified_at: 2019-04-03T15:07:54-04:00
+last_modified_at: 2019-04-03T15:14:26-04:00
 toc: false
 ---
 
@@ -13,6 +13,7 @@ toc: false
 
 ### Enhancements
 
+- Add Thai localized UI text strings. [#2111](https://github.com/mmistakes/minimal-mistakes/pull/2111)
 - Update Font Awesome to [v5.8.1](https://github.com/FortAwesome/Font-Awesome/releases/tag/5.8.1). [#2102](https://github.com/mmistakes/minimal-mistakes/pull/2102)
 - Add missing Vietnamese localized UI text strings. [#2097](https://github.com/mmistakes/minimal-mistakes/pull/2097)
 - Replace jQuery Smooth Scroll with Smooth Scroll + Gumshoe. [#2082](https://github.com/mmistakes/minimal-mistakes/pull/2082)