Kob 40500 update app api docs with postman info

[tungmhoang]

Summary

• Preview link: http://10.2.7.208/apps/upload-an-app/using-the-kobiton-api-postman

Related PRs, issues, or features (optional)

• https://kobiton.atlassian.net/browse/KOB-40500

Metadata

• [x] Adds new file(s)
• [x] Edits existing file(s)
• [x] Removes file(s)

PR contributor checklist

• [x] My PR follows the Kobiton Docs contributor guidelines, meaning:

  • My content contains correct spelling and grammar.
  • My directories and files are named and structured correctly.
  • My style and voice follows the Microsoft Style Guide.
  • I added all new pages to their section's nav.adoc file.
  • I removed all localizations (like en-us) from my URLs.