Add missing snippet id.

Author: Mati365

docs/_snippets/getting-started/use-builder.html

@@ -1,4 +1,4 @@
-<div class="c-banner no-transform">
+<div class="c-banner no-transform" id="ckeditor5-5-builder">
 	<h2 class="c-banner__headline">Create your own <span>CKEditor&nbsp;5</span></h2>
 
 	<p class="c-banner__paragraph">Check out our interactive Builder to quickly get a taste of CKEditor&nbsp;5. It
@@ -13,7 +13,7 @@ <h2 class="c-banner__headline">Create your own <span>CKEditor&nbsp;5</span></h2>
 	</ul>
 	<p class="c-banner__paragraph">You get ready-to-use code tailored to your needs!</p>
 	<p class="c-banner__buttons">
-		<a class="c-button c-button--primary c-button--base c-button--rounded doc"
+		<a class="c-button--rounded c-button c-button--primary c-button--base doc"
 			href="https://ckeditor.com/ckeditor-5/builder?redirect=docs" target="_blank" role="link">
 			<span class="c-button__label doc">Check out our interactive Builder</span>
 		</a>