fix(entra): add metadata description for check entra_admin_users_phishing_resistant_mfa_enabled

[danibarranqueroo]

Context

We noticed that the check entra_admin_users_phishing_resistant_mfa_enabled had an incomplete metadata description.

Description

Added a proper description.

Checklist

• Are there new checks included in this PR? Yes / No
  • If so, do we need to update permissions for the provider? Please review this carefully.
• Review if the code is being covered by tests.
• Review if code is being documented following this specification https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings
• Review if backport is needed.
• Review if is needed to change the Readme.md
• Ensure new entries are added to CHANGELOG.md, if applicable.

API

• Verify if API specs need to be regenerated.
• Check if version updates are required (e.g., specs, Poetry, etc.).
• Ensure new entries are added to CHANGELOG.md, if applicable.

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.73%. Comparing base (f87b208) to head (9a35732).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8654      +/-   ##
==========================================
+ Coverage   75.60%   80.73%   +5.12%     
==========================================
  Files          72      164      +92     
  Lines        4927     8485    +3558     
==========================================
+ Hits         3725     6850    +3125     
- Misses       1202     1635     +433     

Flag	Coverage Δ
prowler	80.73% <ø> (+5.12%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
prowler	80.73% <ø> (+5.12%)	⬆️
api	∅ <ø> (∅)

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