Issue : Review and update API Management rule docs #867

[vuvasira]

PR Summary

Updated the markdown files, with the ARM and Bicep examples.

PR Checklist

• [x] PR has a meaningful title
• [x] Summarized changes
• [x] Change is not breaking
• [ ] This PR is ready to merge and is not Work in Progress
• Rule changes
  • [ ] Unit tests created/ updated
  • [ ] Rule documentation created/ updated
  • [ ] Link to a filed issue
  • [ ] Change log has been updated with change under unreleased section
• Other code changes
  • [ ] Unit tests created/ updated
  • [ ] Link to a filed issue
  • [ ] Change log has been updated with change under unreleased section