Bump NSubstitute from 4.2.1 to 4.2.2 in /tests/NLog.Web.Tests (#581)

Bumps NSubstitute from 4.2.1 to 4.2.2.

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

tests/NLog.Web.Tests/NLog.Web.Tests.csproj

@@ -21,7 +21,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="2.1.1" />
     <PackageReference Include="MSTest.TestFramework" Version="2.1.1" />
-    <PackageReference Include="NSubstitute" Version="4.2.1" />
+    <PackageReference Include="NSubstitute" Version="4.2.2" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />