Update reportgenerator to v5.1.6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ReportGenerator	nuget	patch	5.1.5 -> 5.1.6
dotnet-reportgenerator-globaltool	nuget	patch	5.1.5 -> 5.1.6

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Release Notes

danielpalme/ReportGenerator

v5.1.6

This release requires .NET 4.7 or .NET Core 3.1/5.x/6.x.

Changes:

• #​514: Improved plugin handling for netstandard2.0

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Configuration

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[codecov]

Codecov Report

Merging #694 (4017699) into master (416e09d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #694   +/-   ##
=======================================
  Coverage   83.39%   83.39%           
=======================================
  Files          16       16           
  Lines         548      548           
  Branches       35       35           
=======================================
  Hits          457      457           
  Misses         91       91           

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