add fit-text to demo

demo.html

@@ -184,19 +184,24 @@
 						## Markdown support
 
 						Write content using inline or external Markdown.
-						Instructions and more info available in the [readme](https://revealjs.com/markdown/).
+						Instructions and more info available in the [docs](https://revealjs.com/markdown/).
 
 						```[]
 						<section data-markdown>
 						  ## Markdown support
 
 						  Write content using inline or external Markdown.
-						  Instructions and more info available in the [readme](https://revealjs.com/markdown/).
+						  Instructions and more info available in the [docs](https://revealjs.com/markdown/).
 						</section>
 						```
 					</script>
 				</section>
 
+				<section>
+					<p>Add the <code>r-fit-text</code> class to auto-size text</p>
+					<h2 class="r-fit-text">FIT TEXT</h2>
+				</section>
+
 				<section>
 					<section id="fragments">
 						<h2>Fragments</h2>