[mediaqueries-3] fix typo

See #7198

Author: frivoal

mediaqueries-3/Overview.html

@@ -1195,7 +1195,7 @@ <h3 id=changes-2012><span class=secno>7.1. </span>Changes Since the 19 June 2012
      To avoid circular dependencies, <del>it is never</del><ins>unless another feature explicitly specifies that it affects the resolution of Media Queries, it is not</ins> necessary to apply the style sheet in order to evaluate expressions.
     </blockquote>
 
-   <li><a href="#syntax">Section 3</a>: Used a more precise term to caracterize the syntax of css,
+   <li><a href="#syntax">Section 3</a>: Used a more precise term to characterize the syntax of css,
     in a descriptive (rather than prescriptive) sentence.
     <blockquote>
      CSS style sheets are generally <del>case-insensitive</del>