Update xml/System.Net.Http/HttpClientHandler.xml

Co-authored-by: Miha Zupan <[email protected]>

Author: gewarren

xml/System.Net.Http/HttpClientHandler.xml

@@ -506,7 +506,7 @@ If the <xref:System.Net.Http.HttpClientHandler.UseDefaultCredentials> property h
 
  The <xref:System.Net.Http.HttpClientHandler.DangerousAcceptAnyServerCertificateValidator%2A> property addresses this limitation. The delegate returned by the <xref:System.Net.Http.HttpClientHandler.DangerousAcceptAnyServerCertificateValidator%2A> property can be assigned to the <xref:System.Net.Http.HttpClientHandler.ServerCertificateCustomValidationCallback%2A> property, as the following example does:
 
- ```csharp
+```csharp
 handler.ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator;
 ```