Add documentation about .text-decoration-none (#27686)

Author: ysds

site/docs/4.1/utilities/text.md

@@ -112,3 +112,12 @@ Reset a text or link's color with `.text-reset`, so that it inherits the color f
 </p>
 {% endcapture %}
 {% include example.html content=example %}
+
+## Text decoration
+
+Remove a text decoration with a `.text-decoration-none` class.
+
+{% capture example %}
+<a href="#" class="text-decoration-none">Non-underlined link</a>
+{% endcapture %}
+{% include example.html content=example %}