Need review today: Please review Silver acknowledgements

It turns out we (I) overlooked putting the acknowledgements section into 
the WCAG 3 draft. I've taken a stab:

https://raw.githack.com/w3c/silver/acknowledgements/guidelines/index.html#acknowledgements

I used my judgement about people who have contributed, but almost 
certainly missed people. Please let me know whom to add.

I combined Silver CG and Silver TF because they operate as a unit. 
Normally I include company names alongside the individual, but things 
were all over the map and I couldn't get something consistent, so I just 
omitted that.

I drew in part from an early draft:

https://github.com/w3c/silver/blob/8809343c30a291bdac05d67a419fc65c0c785af3/edDraft/index.html

 From that, I also pulled in the "research partners" list. I didn't 
include the Design Sprint because I don't think that rises to the level 
of a spec acknowledgement - though perhaps those names should be 
credited as CG participants. I'm not sure either about the research 
partners, whether it rises to the level of belonging there, I'd like 
input on that.

Michael