December news update

Carlos' twitter space: https://twitter.com/carlosedp/status/1469355189891125255
Silicon compiler: https://www.siliconcompiler.com/
Amaranth: https://github.com/amaranth-lang/amaranth
MPW2 rerun: https://efabless.com/projects/585
MPW4 application: https://efabless.com/projects/596
Caravel restructure: https://github.com/efabless/caravel
SkullFET: https://twitter.com/UriShaked/status/1472258972505812992
Will's FPGA advent calendar: https://twitter.com/WillFlux/status/1465268154733637633