Bump AsyncKeyedLock to 6.3.4; performance improvement

Directory.Packages.props

@@ -4,7 +4,7 @@
   </PropertyGroup>
   <!-- Run "dotnet list package (dash,dash)outdated" to see the latest versions of each package.-->
   <ItemGroup Label="Package Dependencies">
-    <PackageVersion Include="AsyncKeyedLock" Version="6.3.3" />
+    <PackageVersion Include="AsyncKeyedLock" Version="6.3.4" />
     <PackageVersion Include="AutoFixture.AutoMoq" Version="4.18.1" />
     <PackageVersion Include="AutoFixture.Xunit2" Version="4.18.1" />
     <PackageVersion Include="AutoFixture" Version="4.18.1" />