Update article.md

fix typo

Author: janwillemkeizer

app/ng-ui-widgets-category/activity-indicator/setting-busy-http-request/article.md

@@ -1,7 +1,7 @@
-Extended example, desmostrating how to use ActivityIndicator during HTTP request
+Extended example, demonstrating how to use ActivityIndicator during HTTP request
 
 Setting an activity indicator in the HTML:
 <snippet id='activity-indicator-setting-busy-html'/>
 
 Setting an activity indicator’s `busy` property value:
-<snippet id='activity-indicator-setting-busy-code'/>
+<snippet id='activity-indicator-setting-busy-code'/>