Enforce exactly two words in randomname.get_name

[dpaleka]

The command randomname.get_name() returns a string of the form abcd-efgh more than 99% of the time.
But, sometimes it returns a string of the form abcd-efgh-ijkl. This can break some fragile workflows.

There are exactly two offending lines for the adj-noun recipe:
https://github.com/imsky/wordlists/blob/b26782e929a288d55fae6f507760291b9367418d/nouns/food.txt#L40
https://github.com/imsky/wordlists/blob/cfee5df781890de614e8f634ed49ad853116ed35/adjectives/algorithms.txt#L20

I don't know whether it makes sense to ask for the change in the upstream repo, or to fix it here.