[docs] Update ::call_frames::ContractId to ::contract_id::ContractId in Native Assets Documentation

[0x0077]

Description

The syntax std::call_frames::ContractId has been updated in the latest version of Sway. The new syntax is std::contract_id::ContractId. To ensure the documentation is accurate and consistent with the latest version, this update is necessary.

Reason for Change:

• The std::call_frames::ContractId syntax has been deprecated or modified in the latest version of Sway.
• Using the latest std::contract_id::ContractId syntax ensures the documentation is accurate and helps developers avoid using outdated syntax.

Reference

#5867

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
  • If my change requires substantial documentation changes, I have requested support from the DevRel team
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[CLAassistant]

All committers have signed the CLA.