typo in comment in plant_meta.yml

[hecv14]

I think there is a minuscule typo in a comment in the plant_meta.yml.

Line 7 reads:
rated_power: Rated_power # rated power, MW
units should be instead:
rated_power: Rated_power # rated power, kW

[RHammond2]

Thanks for flagging this, @hecv14, I'll get a fix in for this next week.