SqlSetup: Updated documentation for BrowserSvcStartupType

[johlju]

Pull Request (PR) description

• SqlSetup
  • Added a note to the documentation that the parameter BrowserSvcStartupType
    cannot be used for configurations that utilize the 'InstallFailoverCluster'
    action (issue Clarify use of BrowserSvcStartupType when used with failover installs. #1627).
  • Minor change to the evaluation of the parameter BrowserSvcStartupType,
    if it has an assigned a value or not.

This Pull Request (PR) fixes the following issues

• Fixes Clarify use of BrowserSvcStartupType when used with failover installs. #1627

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 #1635 (726e739) into master (c7146f9) will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master   #1635   +/-   ##
======================================
  Coverage      98%     98%           
======================================
  Files          37      37           
  Lines        6040    6040           
======================================
  Hits         5949    5949           
  Misses         91      91           

Flag	Coverage Δ
unit	98% <100%> (ø)

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Impacted Files	Coverage Δ
source/DSCResources/DSC_SqlSetup/DSC_SqlSetup.psm1	98% <100%> (ø)

[johlju]

Reviewed 3 of 3 files at r1, 1 of 1 files at r2.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @johlju)