Suggest CodePen along with JSBin. (twbs#24238)

Author: XhmikosR

.github/ISSUE_TEMPLATE.md

@@ -14,7 +14,7 @@ When reporting a bug, include:
 
 - Operating system and version (Windows, Mac OS X, Android, iOS, Win10 Mobile)
 - Browser and version (Chrome, Firefox, Safari, IE, MS Edge, Opera 15+, Android Browser)
-- Reduced test cases and potential fixes using [JS Bin](https://jsbin.com/)
+- Reduced test cases and potential fixes using [CodePen](https://codepen.io/) or [JS Bin](https://jsbin.com/)
 
 When suggesting a feature, include: