doc: fix typo "ndapi" in n-api.md

PR-URL: nodejs#13484
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>

Author: Jamen Marz

doc/api/n-api.md

@@ -703,7 +703,7 @@ added: v8.0.0
 NODE_EXTERN napi_status napi_create_reference(napi_env env,
                                               napi_value value,
                                               int initial_refcount,
-                                              ndapi_ref* result);
+                                              napi_ref* result);
 ```
 
 - `[in] env`: The environment that the API is invoked under.
@@ -2999,7 +2999,7 @@ support it:
 * If the function is not available, provide an alternate implementation
   that does not use the function.
 
-[Aynchronous Operations]: #n_api_asynchronous_operations
+[Asynchronous Operations]: #n_api_asynchronous_operations
 [Basic N-API Data Types]: #n_api_basic_n_api_data_types
 [ECMAScript Language Specification]: https://tc39.github.io/ecma262/
 [Error Handling]: #n_api_error_handling