Fixes jgthms#2862 (jgthms#2874)

* Fixes jgthms#2862

Why:

* According Twitter brand guideline says we cannot use the "Twitter icon" with "Twitter text".

This change addresses the need by:

* Replacing the span text from Twitter for @bulma

* Updates button text

Changes @bulma to @jgthms

Co-authored-by: Ricardo Martins (ext.) <Ricardo.Martins@ctw.bmwgroup.com>

Author: fmmricardo

docs/documentation/elements/button.html

@@ -221,7 +221,7 @@
     <span class="icon">
       <i class="fab fa-twitter"></i>
     </span>
-    <span>Twitter</span>
+    <span>@jgthms</span>
   </button>
   <button class="button is-success">
     <span class="icon is-small">