Upgrade Rx.NET to 6.0.1

Author: TolikPylypchuk

SharpHook.Reactive/SharpHook.Reactive.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <PackageTags>$(PackageTags) rx reactive</PackageTags>
@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
-    <PackageReference Include="System.Reactive" Version="6.0.0" />
+    <PackageReference Include="System.Reactive" Version="6.0.1" />
   </ItemGroup>
 
   <ItemGroup>