Update documentation for #2621 (#2624)

* Update documentation for #2621

* Update CHANGELOG and history

* Update last_modified_at

docs/_docs/01-quick-start-guide.md

@@ -2,7 +2,7 @@
 title: "Quick-Start Guide"
 permalink: /docs/quick-start-guide/
 excerpt: "How to quickly install and setup Minimal Mistakes for use with GitHub Pages."
-last_modified_at: 2020-04-27
+last_modified_at: 2020-07-27
 redirect_from:
   - /theme-setup/
 toc: true
@@ -136,12 +136,17 @@ Depending on the path you took installing Minimal Mistakes you'll setup things a
 
 Starting with an empty folder and `Gemfile` you'll need to copy or re-create this [default `_config.yml`](https://github.com/mmistakes/minimal-mistakes/blob/master/_config.yml) file. For a full explanation of every setting be sure to read the [**Configuration**]({{ "/docs/configuration/" | relative_url }}) section.
 
-From `v4.5.0` onwards, Minimal Mistakes theme-gem comes bundled with the necessary data files and will automatically use them via the [`jekyll-data`](https://github.com/ashmaroli/jekyll-data) plugin. So you no longer need to maintain a copy of these data files at your project directory.
+From `v4.5.0` onwards, Minimal Mistakes theme-gem comes bundled with the necessary data files for localization.
+They will be picked up automatically if you have the [`jekyll-data`](https://github.com/ashmaroli/jekyll-data) plugin installed.
+If you're hosting on GitHub Pages, you can copy the [`_data/ui-text.yml`][ui-text.yml] file into your repository for the localization feature to work.
 
 You'll need to create and edit these data files to customize them:
 
-- [`_data/ui-text.yml`](https://github.com/mmistakes/minimal-mistakes/blob/master/_data/ui-text.yml) - UI text [documentation]({{ "/docs/ui-text/" | relative_url }})
-- [`_data/navigation.yml`](https://github.com/mmistakes/minimal-mistakes/blob/master/_data/navigation.yml) - navigation [documentation]({{ "/docs/navigation/" | relative_url }})
+- [`_data/ui-text.yml`][ui-text.yml] - UI text [documentation]({{ "/docs/ui-text/" | relative_url }})
+- [`_data/navigation.yml`][navigation.yml] - navigation [documentation]({{ "/docs/navigation/" | relative_url }})
+
+  [ui-text.yml]: https://github.com/mmistakes/minimal-mistakes/blob/master/_data/ui-text.yml
+  [navigation.yml]: https://github.com/mmistakes/minimal-mistakes/blob/master/_data/navigation.yml
 
 ### Starting from `jekyll new`
 
@@ -174,8 +179,7 @@ You won't need these anymore as they're bundled with the theme gem --- unless yo
 **Note:** When clearing out the `assets` folder be sure to leave any files you've added and need. This includes images, CSS, or JavaScript that aren't already [bundled in the theme](https://github.com/mmistakes/minimal-mistakes/tree/master/assets). 
 {: .notice--warning}
 
-From `v4.5.0` onwards, you don't have to maintain a copy of the default data files viz. `_data/ui-text.yml` and `_data/navigation.yml` either.
-The default files are read-in automatically via the [`jekyll-data`](https://github.com/ashmaroli/jekyll-data) plugin.
+From `v4.5.0` onwards, the default language files are read-in automatically via the [`jekyll-data`](https://github.com/ashmaroli/jekyll-data) plugin if it's installed. For sites hosted with GitHub Pages, you still need to copy the [`_data/ui-text.yml`][ui-text.yml] file because the `jekyll-data` plugin [is unsupported on GitHub Pages](https://docs.github.com/en/github/working-with-github-pages/about-github-pages-and-jekyll#plugins).
 
 If you customized any of these files leave them alone, and only remove the untouched ones. If done correctly your modified versions should [override](https://jekyllrb.com/docs/themes/#overriding-theme-defaults) the versions bundled with the theme and be used by Jekyll instead.
 
@@ -196,7 +200,7 @@ When finished your `Gemfile` should look something like this:
 ```ruby
 source "https://rubygems.org"
 
-gem "jekyll", "~> 3.5"
+gem "jekyll", "~> 3.7"
 gem "minimal-mistakes-jekyll"
 ```