Missing promotionalCredit package in v3.16.1

[EdisShabi]

Description of the Bug

I encountered an issue while using the github.com/chargebee/chargebee-go/v3 module. It seems that the promotionalCredit package is missing in version 3.16.1.
Refer: https://apidocs.chargebee.com/docs/api/v1/customers?lang=go#add_account_credits_to_a_customer

Steps to reproduce

1. Attempt to import github.com/chargebee/chargebee-go/v3/models/promotionalCredit.
2. Observe the error indicating that the package cannot be found.

Expected Behavior

I got it to work only after I downloaded the chargebee library and noticed that 'promotionalCredit' is actually be written as 'promotionalcredit'.

Code Snippets (if applicable)

No response

Operating System

macOS

Language version

GO 1.21.1

Library version

3.16.1

Additional context

No response

[github-actions]

Hello @EdisShabi, thank you for raising the issue. Your contribution is greatly appreciated and we look forward to addressing it.