Find and switch to a curated diceware list for admin passwords

[kitsuta]

For our "diceware" password generator, we pull random words from the dictionary to assemble into a default password for admin accounts. Unfortunately for us, the dictionary contains a lot of words. Many of those words are words we really don't want to serve up to attendees: swear words, slurs, etc. We should instead find and switch to a list of words that doesn't contain literally every word in existence.