docs(readme): update installation - remove note for installation

Author: stephenlautier

README.md

@@ -26,9 +26,6 @@ Http Client for .NET Standard with fluent APIs which are intuitive, easy to use
 - File upload support
 
 ## Installation
-Available for [.NET Standard 2.0+](https://docs.microsoft.com/en-gb/dotnet/standard/net-standard)
-
-NOTE: 1.x depends on .NET Standard 1.4+, use that if you need older .NET standard.
 
 ## dotnet support
 
@@ -53,6 +50,7 @@ PM> Install-Package FluentlyHttpClient
 ## Table of Contents <!-- omit in toc -->
 - [Features](#features)
 - [Installation](#installation)
+- [dotnet support](#dotnet-support)
   - [NuGet](#nuget)
   - [csproj](#csproj)
 - [Usage](#usage)