chore(form-input-range): Added aria-label to Range example (#5472)

Author: JuanFernandoCastaneda

templates/docs/examples/base/forms/range.html

@@ -4,8 +4,8 @@
 {% block standalone_css %}base{% endblock %}
 
 {% block content %}
-<input type="range" min="0" max="100" value="50" step="1" />
-<input type="range" min="0" max="100" value="50" step="1" disabled />
+<input type="range" min="0" max="100" value="50" step="1" aria-label="Enabled Range example"/>
+<input type="range" min="0" max="100" value="50" step="1" disabled aria-label="Disabled Range Example" />
 
 <script>
 var isWebkit =