ADReplicationSiteLink: Fix for Options when ReplicationFrequencyInMinute not set

[Borgquite]

Pull Request (PR) description

Allow OptionChangeNotification, OptionTwoWaySync and OptionDisableCompression to be updated even if ReplicationFrequencyInMinutes is not set (fixes #637)

This Pull Request (PR) fixes the following issues

• Fixes #637

Task list

• [x] 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 

[johlju]

/azurepipelines run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov[bot]]

Codecov Report

Merging #699 (413817e) into main (b2838d9) will not change coverage. Report is 1 commits behind head on main. The diff coverage is 100%.

@@         Coverage Diff         @@
##           main   #699   +/-   ##
===================================
  Coverage    98%    98%           
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  Files        25     25           
  Lines      3471   3471           
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  Hits       3402   3402           
  Misses       69     69           

Files Changed	Coverage Δ
...eplicationSiteLink/MSFT_ADReplicationSiteLink.psm1	99% <100%> (ø)