Take the Azure Functions Service Bus Worker NServiceBus 9 sample out of prerelease (#7620)

* Created nsb10 sample

* Removed nsb 10 sample

* Updated NServiceBus.AzureFunctions.Worker.ServiceBus package to 6.0.0

Author: ngallegos

samples/azure-functions/service-bus-worker/ASBFunctionsWorker_6/AzureFunctions.ASBTrigger.Worker/AzureFunctions.ASBTrigger.Worker.csproj

@@ -9,7 +9,7 @@
     <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.*" />
     <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="2.*" />
     <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.*" />
-    <PackageReference Include="NServiceBus.AzureFunctions.Worker.ServiceBus" Version="6.0.0-beta.1" />
+    <PackageReference Include="NServiceBus.AzureFunctions.Worker.ServiceBus" Version="6.0.0" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\AzureFunctions.Messages\AzureFunctions.Messages.csproj" />