doc: fix missing napi_get_typedarray_info() param

Also, make the type name notation more consistent.

PR-URL: #20631
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>

Author: Gabriel Schulhof

doc/api/n-api.md

@@ -1697,8 +1697,9 @@ napi_status napi_get_typedarray_info(napi_env env,
 - `[in] typedarray`: `napi_value` representing the `TypedArray` whose
 properties to query.
 - `[out] type`: Scalar datatype of the elements within the `TypedArray`.
-- `[out] length`: `Number` of elements in the `TypedArray`.
-- `[out] data`: The data buffer underlying the typed array.
+- `[out] length`: The number of elements in the `TypedArray`.
+- `[out] data`: The data buffer underlying the `TypedArray`.
+- `[out] arraybuffer`: The `ArrayBuffer` underlying the `TypedArray`.
 - `[out] byte_offset`: The byte offset within the data buffer from which
 to start projecting the `TypedArray`.