Bump NUnit from 4.0.0 to 4.0.1 (#197)

Author: dependabot[bot]

src/AsyncAwaitBestPractices.UnitTests/AsyncAwaitBestPractices.UnitTests.csproj

@@ -5,7 +5,7 @@
         <IsPackable>false</IsPackable>
     </PropertyGroup>
     <ItemGroup>
-        <PackageReference Include="NUnit" Version="4.0.0" />
+        <PackageReference Include="NUnit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>