Improve comment (#706)

Co-authored-by: Casper da Costa-Luis <casper.dcl@physics.org>

iterative/utils/analytics.go

@@ -349,7 +349,7 @@ func JitsuEventPayload(action string, e error, extra map[string]interface{}) (ma
 	}
 
 	if e != nil { 
-		// Get the type of the error as a string, but not the error message itself, because it can be sensitive.
+		// Only use error type (not message) to avoid potentially sensitive information
 		payload["error"] = reflect.TypeOf(e).String()
 	}