Fixing typo

Author: superchilled

lib/vonage/verify2.rb

@@ -33,7 +33,7 @@ class Verify2 < Namespace
     # @see https://developer.vonage.com/en/api/verify.v2#newRequest
     #
     def start_verification(brand:, workflow:, **opts)
-      raise ArgumentError, ':workflow must be a String' unless brand.is_a?(String)
+      raise ArgumentError, ':brand must be a String' unless brand.is_a?(String)
       raise ArgumentError, "Invalid 'brand' value #{brand}. Length must be between 1 and 16 characters." unless brand.length.between?(1, 16)
       raise ArgumentError, ':workflow must be an Array' unless workflow.is_a?(Array)
       raise ArgumentError, ':workflow must not be empty' if workflow.empty?