feat: CoPilot billing seats and code security configuration

[octokitbot]

"The latest OpenAPI spec resulted in changes to the generated code. Please review, set an applicable commit message, merge, and tag a release as appropriate."

[what-the-diff]

PR Summary

• New Files Added
  The addition of the following three files to the 'github/enterprises' package will enhance our project's capabilities:

  1. item_copilot_billing_request_builder.go
  2. item_copilot_billing_seats_get_response.go
  3. item_copilot_billing_seats_request_builder.go

• Updates in Existing File
  In the item_copilot_request_builder.go file, a new property Billing() has been added to the ItemCopilotRequestBuilder struct. This will help in facilitating financial transactions for the item copilot feature.

• Changes in Dependency Lock File
  Modifications have been made to kiota-lock.json. This involves updates to dependencies of the project, making sure we have the most stable and latest versions for the smooth operation of our project.