broken link from NE page to HW platforms on sixsq.com

On https://docs.nuvla.io/nuvlaedge/
```
To ensure a smooth edge deployment and operation, SixSq has certified a number of 
[hardware platforms](https://sixsq.com/products-and-services/nuvlabox/tech-spec),
including x86 and ARM based systems, from HPE, Dell, Logic Supply, Raspberry Pi and Nvidia.
```

It should probably point to `https://sixsq.com/nuvlaedge#hardware` instead.