Update template to v2.1

Author: Sergey Tregub

ProjectTemplates/ReferenceProjectVSIX/ProjectTemplates/CSharp/.NET Core/ASP.Net Core RESTful Service.zip

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PackageManifest Version="2.0.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2011" xmlns:d="http://schemas.microsoft.com/developer/vsx-schema-design/2011">
     <Metadata>
-        <Identity Id="ASP.Net Core RESTful Service Template-1" Version="2.0" Language="en-US" Publisher="Sergey Tregub" />
+        <Identity Id="ASP.Net Core RESTful Service Template-1" Version="2.1" Language="en-US" Publisher="Sergey Tregub" />
         <DisplayName>ASP.Net Core 3.1 RESTful Service Template</DisplayName>
         <Description xml:space="preserve">Project template to create production-ready RESTful service based on ASP.Net Core 3.1. It contains preconfigured DI-container, logging, CORS, some boilerplate code and other features</Description>
         <MoreInfo>https://github.com/drwatson1/AspNet-Core-REST-Service</MoreInfo>