DSC_WebSite: Change CertificateStoreName value in the schema

[webalexeu]

Pull Request (PR) description

Change CertificateStoreName value in the schema to match the value returned by DSC
This is aligned with the testing defined

WebAdministrationDsc/tests/Unit/DSC_Website.Tests.ps1

Line 2252 in 3db41e4

certificateStoreName = 'MY'

This Pull Request (PR) fixes the following issues

Fixes #642

Task list

• Added an entry to the change log under the Unreleased section of the file CHANGELOG.md.
  Entry should say what was changed and how that affects users (if applicable), and
  reference the issue being resolved (if applicable).
• Resource documentation added/updated in README.md.
• Resource parameter descriptions added/updated in README.md, schema.mof and comment-based
  help.
• Comment-based help added/updated.
• Localization strings added/updated in all localization files as appropriate.
• Examples appropriately added/updated.
• Unit tests added/updated. See DSC Community Testing Guidelines.
• Integration tests added/updated (where possible). See DSC Community Testing Guidelines.
• New/changed code adheres to DSC Community Style Guidelines.

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This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88%. Comparing base (da0cd60) to head (23cbe10).
Report is 1 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #641   +/-   ##
===================================
  Coverage    88%    88%           
===================================
  Files        15     15           
  Lines      1952   1952           
===================================
  Hits       1726   1726           
  Misses      226    226