[css-inline-3] Markup fix

Author: fantasai

css-inline-3/Overview.bs

@@ -281,7 +281,7 @@ Introduction to Baselines</h3>
 		<img alt="Picture of alphabetic text in two font sizes with the baseline and em-boxes"
 		     width="480"
 		     src="images/alphabetic-baseline-in-two-font-sizes.svg"></p>
-		<ficaption>
+		<figcaption>
 			Alphabetic text in two font sizes with the baseline and em-boxes
 		</figcaption>
 	</figure>