Update links.cfm

Added information in description for buttonTo() function about the need for "input" as prefix to add attributes. Didn't add it in arguments list as attributes aren't mentioned anywhere like that, only in description at top.

Also searched for more input prefix related functions, couldn't find them, correct me if i'm wrong.

Thanks for mentioning by @cfcoder in: cfwheels#1352

wheels/view/links.cfm

@@ -78,7 +78,7 @@ public string function linkTo(
 }
 
 /**
- * Creates a form containing a single button that submits to the URL.
+ * Creates a form containing a single button that submits to the URL. Note: Pass any additional arguments by prefixing them with "input" like inputClass, inputRel, and inputId, and the generated tag will also include those values as HTML attributes.
  * The URL is built the same way as the `linkTo` function.
  *
  * [section: View Helpers]