[Feat]: Add RestrictionComments to Parameters.CustomsInfo.Create.cs

[chadwixk]

Feature Request Is New

• I have verified that the requested feature does not already exist or has not already been requested.

Description of the feature

EasyPost docs state RestrictionComments are required if RestrictionType is not "none".

[nwithan8]

Thanks for reaching out!

We are adding the missing property now.