Update dependency FsCheck.XUnit to v2.16.6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
FsCheck.XUnit	nuget	patch	2.16.5 -> 2.16.6

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Release Notes

fsharp/FsCheck (FsCheck.XUnit)

### [`v2.16.6`](https://togithub.com/fscheck/FsCheck/releases/tag/2.16.6) [Compare Source](https://togithub.com/fsharp/FsCheck/compare/2.16.5...2.16.6) Added Map and Return methods to make FsCheck more F#+ friendly. (by Gustavo Leon)

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Configuration

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🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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[codecov[bot]]

Codecov Report

Merging #96 (83b9178) into develop (3b35f4d) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop      #96   +/-   ##
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  Coverage    85.45%   85.45%           
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  Files            8        8           
  Lines          110      110           
  Branches        20       20           
========================================
  Hits            94       94           
  Misses          13       13           
  Partials         3        3           

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