fix(icon-success): update success class (#5179)

Co-authored-by: dugg molidor <[email protected]>

Author: greensteph

ui/components/icons/docs.mdx

@@ -129,7 +129,7 @@ To change the fill of an icon to match the current color of its parent, add the
 To change the fill of an icon to the success text color, add the `slds-icon-text-success` class to the icon.
 
 <CodeView>
-  {getDisplayElementById(UtilityIconExamples.examples, 'text-warning')}
+  {getDisplayElementById(UtilityIconExamples.examples, 'text-success')}
 </CodeView>
 
 ### Warning