Update README.md (#175)

Co-authored-by: Parvez <ppathan@users.noreply.github.com>

README.md

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 [![Issues][issues-badge]][issues-url]
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+### **Note:** As of December 10th 2020, Remote Monitoring solution accelerator is no longer supported. All supporting repositories have been archived. Check the [FAQ](https://docs.microsoft.com/en-us/azure/iot-accelerators/iot-accelerators-faq) to learn more.
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 Remote Monitoring Solution with Azure IoT
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