Fix Package Name

Author: inyutin-maxim

README.MD

@@ -3,7 +3,7 @@
 ``` bash
 > dotnet add package System.IO.Abstractions
 ```
-2. Add to project nuget package `System.IO.Abstractions.Analyzers`
+2. Add to project nuget package `Roslyn.System.IO.Abstractions.Analyzers`
 ``` bash
 > dotnet add package Roslyn.System.IO.Abstractions.Analyzers
 ```