doc: correct JavaScript primitive value names in n-api.md
- Correct JavaScript primitive value names to reflect their actual types rather than the Built-in object.
-
napi_throw
can receive arbitrary JavaScript values, but not limited to objects. -
symbol
values are not objects. -
this
may be arbitrary JavaScript values when invoking functions (althoughToObject
will be performed on that value so that in the functionthis
will always be an object).