updated Curity SDK version to 2.4

README.rst

@@ -9,7 +9,7 @@ This project provides an opens source Twitter Authenticator plug-in for the Curi
 System Requirements
 ~~~~~~~~~~~~~~~~~~~
 
-* Curity Identity Server 3.0.0 and `its system requirements <https://developer.curity.io/docs/latest/system-admin-guide/system-requirements.html>`_
+* Curity Identity Server 2.4.0 and `its system requirements <https://developer.curity.io/docs/latest/system-admin-guide/system-requirements.html>`_
 
 Requirements for Building from Source
 """""""""""""""""""""""""""""""""""""
@@ -65,7 +65,6 @@ You can manage permissions to twitter resource in ``Permissions`` section of app
         :align: center
         :width: 500px
 
-
 Creating a Twitter Authenticator in Curity
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~