v2.2.1

Fixed

• ebuild recipe (thx MFF sysadmins)
• RISC-V TLB documentation (@vhotspur, @HanyzPAPU)
• ReadTheDocs configuration (@vhotspur)

Changed

• EBREAK instruction on RISC-V halts simulation without TTY (as is done on MIPS) (@vhotspur)
• move changelog to a more structured format (@vhotspur)