docs/architecture/hardware2020.md is outdated

[antoinealb]

Hello @antoinealb, our 🤖 robots detected that docs/architecture/hardware2020.md has not been reviewed in the last 6 month, and could be outdated.

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Please review docs/architecture/hardware2020.md, do any required changes, change the freshness header to add yourself as a recent reviewer, then commit it to this repository. If the file is not required anymore, you can simply do a commit to delete it, it will not be taken into account anymore.