docs: switch to fenced codeblocks (#31806)

site/content/docs/5.0/getting-started/download.md

@@ -38,17 +38,17 @@ If you want to download and examine our [examples]({{< docsref "/examples" >}}),
 
 Skip the download with [jsDelivr](https://www.jsdelivr.com/) to deliver cached version of Bootstrap's compiled CSS and JS to your project.
 
-{{< highlight html >}}
+```html
 <link rel="stylesheet" href="{{< param "cdn.css" >}}" integrity="{{< param "cdn.css_hash" >}}" crossorigin="anonymous">
 <script src="{{< param "cdn.js_bundle" >}}" integrity="{{< param "cdn.js_bundle_hash" >}}" crossorigin="anonymous"></script>
-{{< /highlight >}}
+```
 
 If you're using our compiled JavaScript and prefer to include Popper.js separately, add Popper.js before our JS, via a CDN preferably.
 
-{{< highlight html >}}
+```html
 <script src="{{< param "cdn.popper" >}}" integrity="{{< param "cdn.popper_hash" >}}" crossorigin="anonymous"></script>
 <script src="{{< param "cdn.js" >}}" integrity="{{< param "cdn.js_hash" >}}" crossorigin="anonymous"></script>
-{{< /highlight >}}
+```
 
 ## Package managers
 
@@ -58,9 +58,9 @@ Pull in Bootstrap's **source files** into nearly any project with some of the mo
 
 Install Bootstrap in your Node.js powered apps with [the npm package](https://www.npmjs.com/package/bootstrap):
 
-{{< highlight sh >}}
+```sh
 npm install bootstrap@next
-{{< /highlight >}}
+```
 
 `const bootstrap = require('bootstrap')` or `import bootstrap from 'bootstrap'` will load all of Bootstrap's plugins onto a `bootstrap` object.
 The `bootstrap` module itself exports all of our plugins. You can manually load Bootstrap's plugins individually by loading the `/js/dist/*.js` files under the package's top-level directory.
@@ -74,23 +74,23 @@ Bootstrap's `package.json` contains some additional metadata under the following
 
 Install Bootstrap in your Node.js powered apps with [the yarn package](https://yarnpkg.com/en/package/bootstrap):
 
-{{< highlight sh >}}
+```sh
 yarn add bootstrap@next
-{{< /highlight >}}
+```
 
 ### RubyGems
 
 Install Bootstrap in your Ruby apps using [Bundler](https://bundler.io/) (**recommended**) and [RubyGems](https://rubygems.org/) by adding the following line to your [`Gemfile`](https://bundler.io/gemfile.html):
 
-{{< highlight ruby >}}
+```ruby
 gem 'bootstrap', '~> {{< param current_ruby_version >}}'
-{{< /highlight >}}
+```
 
 Alternatively, if you're not using Bundler, you can install the gem by running this command:
 
-{{< highlight sh >}}
+```sh
 gem install bootstrap -v {{< param current_ruby_version >}}
-{{< /highlight >}}
+```
 
 [See the gem's README](https://github.com/twbs/bootstrap-rubygem/blob/master/README.md) for further details.
 
@@ -98,18 +98,18 @@ gem install bootstrap -v {{< param current_ruby_version >}}
 
 You can also install and manage Bootstrap's Sass and JavaScript using [Composer](https://getcomposer.org/):
 
-{{< highlight sh >}}
+```sh
 composer require twbs/bootstrap:{{< param current_version >}}
-{{< /highlight >}}
+```
 
 ### NuGet
 
 If you develop in .NET, you can also install and manage Bootstrap's [CSS](https://www.nuget.org/packages/bootstrap/) or [Sass](https://www.nuget.org/packages/bootstrap.sass/) and JavaScript using [NuGet](https://www.nuget.org/):
 
-{{< highlight powershell >}}
+```powershell
 Install-Package bootstrap
-{{< /highlight >}}
+```
 
-{{< highlight powershell >}}
+```powershell
 Install-Package bootstrap.sass
-{{< /highlight >}}
+```