SqlServerDsc: Updated comment-based help (issue #1500)

[johlju]

Pull Request (PR) description

• SqlServerDsc
  • Updated comment-based help according to style guideline throughout
    (issue SqlServerDsc: Fix comment-based help formatting throughout #1500).

This Pull Request (PR) fixes the following issues

• Fixes SqlServerDsc: Fix comment-based help formatting throughout #1500

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 updated in the resource's README.md.
• Resource parameter descriptions updated in schema.mof.
• Comment-based help updated, including parameter descriptions.
• Localization strings updated.
• Examples updated.
• Unit tests updated. See DSC Community Testing Guidelines.
• Integration tests updated (where possible). See DSC Community Testing Guidelines.
• Code changes adheres to DSC Community Style Guidelines.

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This change is 

[codecov]

Codecov Report

Merging #1587 into master will increase coverage by 0%.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master   #1587   +/-   ##
======================================
  Coverage      98%     98%           
======================================
  Files          37      37           
  Lines        6074    6082    +8     
======================================
+ Hits         5970    5978    +8     
  Misses        104     104           

[johlju]

Reviewed 22 of 22 files at r1, 1 of 1 files at r2.
Reviewable status: complete! all files reviewed, all discussions resolved