[css-fonts-4] Fix formatting error after b1e23c2

https://github.com/w3c/csswg-drafts/pull/7815/files#r986475558

Author: litherum

css-fonts-4/Overview.bs

@@ -2795,10 +2795,10 @@ Font property descriptors: the 'font-style!!descriptor', 'font-weight!!descripto
 			src: url(lastima-varfont-heavyrange.woff2);
 			font-weight: 400 700;
 		}
+		</pre>
 		The above ''@font-face'' rules indicate that <code>lastima-varfont-lightrange.woff</code> should be used when
 		'font-weight!!property' is between 100 and 399, whereas </code>lastima-varfont-heavyrange.woff</code> should be used when
 		'font-weight!!property' is between 400 and 700.
-		</pre>
 	</div>
 
 <!--