doc: fix node-api call example
The return statement should not be enclosed in a nested conditional
branch.
Also, the NAPI_CALL macro is renamed to NODE_API_CALL in aligning
with the n-api to node-api transition.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
The return statement should not be enclosed in a nested conditional
branch.
Also, the NAPI_CALL macro is renamed to NODE_API_CALL in aligning
with the n-api to node-api transition.