Update readme file.

Author: mo-esmp

README.md

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 # Dynamic Role-Based Authorization in ASP.NET Core 2.0 and 3.1
-Nuget package comming soon, checkout [dev branch](https://github.com/mo-esmp/DynamicRoleBasedAuthorizationNETCore/tree/dev/src).
-
-Updates:
-- Dynamic authorization sample for [ASP.NET Core 3.1](https://github.com/mo-esmp/DynamicRoleBasedAuthorizationNETCore/tree/master/samples/netcore3.0/DynamicRoleBasedAuthorization) added.
 
 You already know how role-based authorization wokrs in ASP.NET Core.