Fix cref for builder extensions (Azure#50398)

Author: JoshLove-msft

eng/packages/http-client-csharp/generator/Azure.Generator/src/Providers/ClientBuilderExtensionsDefinition.cs

@@ -63,7 +63,7 @@ protected override MethodProvider[] BuildMethods()
                     tConfiguration);
                 var methodName = $"Add{client.Name}";
                 FormattableString methodDescription =
-                    $"Registers a <see cref=\"{client.Name}\"/> client with the specified <see cref=\"{Static(typeof(IAzureClientBuilder<,>))}\"/>.";
+                    $"Registers a <see cref=\"{client.Name}\"/> client with the specified <see cref=\"{typeof(IAzureClientBuilder<,>)}\"/>.";
                 var methodModifiers = MethodSignatureModifiers.Public | MethodSignatureModifiers.Static |
                                       MethodSignatureModifiers.Extension;
                 var methodReturnType = new CSharpType(typeof(IAzureClientBuilder<,>), client.Type,