Typo "Azure IoT hub"→"Azure IoT Hub"

[hyoshioka0128]

https://docs.microsoft.com/en-us/javascript/api/azure-iothub/?view=azure-node-latest
#PingMSFTDocs

[opbld31]

Docs Build status updates of commit aa66202:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
docs-ref-autogen/azure-iothub/index.yml	⚠️Warning	View (azure-node-latest)	Details

docs-ref-autogen/azure-iothub/index.yml

• Line 166, Column 93: [Warning-xref-not-found] Cross reference not found: 'SharedAccessSignature'.

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[scbedd]

Unfortunately @hyoshioka0128 this is not a change that I will be pulling in. This is due to the fact that your updates will be erased on the very next documentation generation. Anything that exists under docs-ref-autogen/ is actually generated by typedoc based on source comments. We will need to submit a PR over at azure-sdk-for-js to resolve this permanently.