Update FAQ.md

[anujmsolguruz]

Adding a little bit more information when writing cli command for writing attributes fields in generating model

Pull Request check-list

Please make sure to review and check all of these items:

• [ ] Does npm run test pass with this change (including linting)?
• [ ] Does the description below contain a link to an existing issue (Closes #[issue]) or a description of the issue you are solving?
• [ ] Have you added new tests to prevent regressions?
• [ ] Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?

Description of change