Azure IoT Edge 1.0.8 release is now available

The [1.0.8 version](https://github.com/Azure/azure-iotedge/releases/tag/1.0.8) of Azure IoT Edge includes the following improvements below. Full release notes can be found on the [GitHub release page for 1.0.8](https://github.com/Azure/azure-iotedge/releases/tag/1.0.8). * Preview support for ARM64 on Linux * Module twins are now encrypted at rest when cached on an IoT Edge device * Performance improvements for uploading messages from Edge Hub to the cloud * Increased reliability for syncing twin updates with the cloud * Improved stability on ARM32 ​Instructions on how to update IoT Edge can be found [here](https://docs.microsoft.com/en-us/azure/iot-edge/how-to-update-iot-edge). * Azure IoT Edge * Features * [ Azure IoT Edge](https://azure.microsoft.com/en-gb/products/iot-edge/)