Take the Azure Functions Service Bus NserviceBus 9 sample out of prerelease (#7621)

Author: ngallegos

samples/azure-functions/service-bus/ASBFunctions_6/AzureFunctions.ASBTrigger.FunctionsHostBuilder/AzureFunctions.ASBTrigger.FunctionsHostBuilder.csproj

@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.*" />
-    <PackageReference Include="NServiceBus.AzureFunctions.InProcess.ServiceBus" Version="6.0.0-beta.1" />
+    <PackageReference Include="NServiceBus.AzureFunctions.InProcess.ServiceBus" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>