Mention supported HTTP versions in WinHttpHandler (dotnet#8532)

Author: rzikm

xml/System.Net.Http/WinHttpHandler.xml

@@ -30,7 +30,7 @@
  
 ## Remarks
 
- <xref:System.Net.Http.WinHttpHandler> is similar to other existing classes such as <xref:System.Net.Http.HttpClientHandler>. <xref:System.Net.Http.WinHttpHandler> provides a handler underneath an <xref:System.Net.Http.HttpClient> instance and is used to send HTTP requests out to a server and receive server responses. 
+ <xref:System.Net.Http.WinHttpHandler> is similar to other existing classes such as <xref:System.Net.Http.HttpClientHandler>. <xref:System.Net.Http.WinHttpHandler> provides a handler underneath an <xref:System.Net.Http.HttpClient> instance and is used to send HTTP requests out to a server and receive server responses. The <xref:System.Net.Http.WinHttpHandler> implementation supports HTTP versions up to HTTP/2.  
  
  <xref:System.Net.Http.WinHttpHandler> is designed to be used primarily in server environments by ASP.NET Core and other .NET applications that communicate with HTTP servers. <xref:System.Net.Http.WinHttpHandler> also provides developers with more granular control over the application's HTTP communication than the <xref:System.Net.Http.HttpClientHandler> class. This allows developers to implement more advanced HTTP scenarios or modify system defaults (for example, proxy settings, timeouts, and server SSL certificate validation).