Instrument code *Ifemale should be *Ifeme

[craigsapp]

In Pawnee and Mandan files, *Ifemale should be *Ifeme.

See https://www.humdrum.org/instrument-codes

[shanahdt]

On it.

[craigsapp]

If you add me as a collaborator I can fix things like this 😉

[shanahdt]

Done!