[S] Change in coreboot[main]: Documentation: add Nitrokey to distributions

[Michał Żygowski (Code Review)]

Attention is currently required from: Markus Meissner, Patrick Georgi.

Michał Żygowski has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/78299?usp=email )

Change subject: Documentation: add Nitrokey to distributions
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Patch Set 3:

(1 comment)

File Documentation/distributions.md:

https://review.coreboot.org/c/coreboot/+/78299/comment/174c829e_62ba3289 :
PS3, Line 23: offers a range of laptops, PCs, HSM, and networking devices with coreboot and
            : [Dasharo](https://dasharo.com/).
`offers a range of laptops, PCs, and networking devices with coreboot/[Dasharo](https://dasharo.com/) as well as HSMs.`

Right now it sounds like HSMs run coreboot as well. Also using plural for HSMs, because the rest is also plural with 's' appended at the end.