Fixed link

[svick]

This seems to be a mistake copied from the old spec. The C# 4.0 spec says:

Note that an explicit conversion to a type parameter will be executed as an unboxing conversion if at run-time it ends up converting from a reference type to a value type (§6.2.6).

Where §6.2.6 is Explicit dynamic conversions (Explicit conversions involving type parameters is §6.2.7).