Fix typo in "connection"

Addressing shinypb#19

index.html

@@ -136,7 +136,7 @@ <h1 id="title">Appcache Facts</h1>
             <p>The <code>FALLBACK</code> section lists replacements for network URLs to be used when the browser is offline or the
             remote server is unavailable.</p>
             <p>The <code>SETTINGS</code> specifies settings for appcache behaviour. Currently, the only available setting is cache mode.</p>
-            <p><code>prefer-online</code>, which indicates that cached data should not be used when the browser has an active internet connection (supported in Firefox 14+ and Opera 12+). The default is <code>fast</code>, which uses the cache even when the browser has an active internet conncetion.</p>
+            <p><code>prefer-online</code>, which indicates that cached data should not be used when the browser has an active internet connection (supported in Firefox 14+ and Opera 12+). The default is <code>fast</code>, which uses the cache even when the browser has an active internet connection.</p>
           </div>
         </li>
         <li>