Include note about escaping backticks (see #546)

Author: mganss

README.md

@@ -409,6 +409,7 @@ Collection types
 
 Values for the `--collectionType` and `--collectionImplementationType` options have to be given in the format accepted by
 the [`Type.GetType()`](https://docs.microsoft.com/en-us/dotnet/api/system.type.gettype) method. For the `System.Collections.Generic.List<T>` class this means ``System.Collections.Generic.List`1``.
+Make sure to escape the backtick character (`` ` ``) to prevent it from being interpreted by the shell.
 
 Integer and derived types
 ---------------------