Update README.md

Signed-off-by: Ninja Sha!4h <najaf.shaikh@gmail.com>

Author: NinjaRocks

README.md

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 # <img src="https://github.com/NinjaRocks/FeatureOne/blob/master/ninja-icon-16.png" alt="ninja" style="width:30px;"/> FeatureOne v3.0.0
 [![NuGet version](https://badge.fury.io/nu/FeatureOne.svg)](https://badge.fury.io/nu/FeatureOne) [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://github.com/NinjaRocks/FeatureOne/blob/master/License.md) [![build-master](https://github.com/NinjaRocks/FeatureOne/actions/workflows/Build-Master.yml/badge.svg)](https://github.com/NinjaRocks/FeatureOne/actions/workflows/Build-Master.yml) [![GitHub Release](https://img.shields.io/github/v/release/ninjarocks/FeatureOne?logo=github&sort=semver)](https://github.com/ninjarocks/FeatureOne/releases/latest)
-[![CodeQL](https://github.com/NinjaRocks/FeatureOne/actions/workflows/codeql.yml/badge.svg)](https://github.com/NinjaRocks/FeatureOne/actions/workflows/codeql.yml) [![.Net Stardard](https://img.shields.io/badge/.Net%20Standard-2.1-blue)](https://dotnet.microsoft.com/en-us/download/dotnet/2.1)
+[![CodeQL](https://github.com/NinjaRocks/FeatureOne/actions/workflows/codeql.yml/badge.svg)](https://github.com/NinjaRocks/FeatureOne/actions/workflows/codeql.yml) [![.Net](https://img.shields.io/badge/.Net%206.0-blue)](https://dotnet.microsoft.com/en-us/download/dotnet/6)
 
 .Net Library to implement feature toggles.
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