Fix typo in readme

Author: angularsen

README.md

@@ -42,7 +42,7 @@ See [Upgrading from 3.x to 4.x](https://github.com/angularsen/UnitsNet/wiki/Upgr
 
 ### Installing
 
-Run the following command in the [Package Manager Console](http://docs.nuget.org/docs/start-here/using-the-package-manager-console) or go to the [NuGet site](https://www.nuget.org/packages/UnitsNet/) for the complete relase history.
+Run the following command in the [Package Manager Console](http://docs.nuget.org/docs/start-here/using-the-package-manager-console) or go to the [NuGet site](https://www.nuget.org/packages/UnitsNet/) for the complete release history.
 
 ![Install-Package UnitsNet](https://raw.githubusercontent.com/angularsen/UnitsNet/master/Docs/Images/install_package_unitsnet.png "Install-Package UnitsNet")