Use Bearer AuthenticationScheme as default

Author: RodrigoPereyraDiaz

src/MakingSense.AspNetCore.Authentication.SimpleToken/SimpleTokenDefaults.cs

@@ -6,7 +6,7 @@ namespace MakingSense.AspNetCore.Authentication.SimpleToken
 {
 	public static class SimpleTokenDefaults
 	{
-		public const string AuthenticationScheme = "SimpleToken";
+		public const string AuthenticationScheme = "Bearer";
 
 		public static readonly string DisplayName = "Simple Token";
 	}