Add species description to translation

[AMurkin]

Summary

SUMMARY: None

Purpose of change

Add species description to translation.
Was missed in #36906.

Describe the solution

Move "SPECIES" from ignorable to automatically_convertible in lang/extract_json_strings.py script.

Describe alternatives you've considered

None.

Testing

Strings extracted to lang/json/SPECIES_from_json.py

_('a mammal')
_('an amphibian')
_('a bird')
_('a reptile')
_('a fish')
_('a mutant')
_('a nether creature')
_('a blob')
_('plop.')
_('a fungus')
_('a leech plant')
_('an insect')
_('a spider')
_('a plant')
_('a mollusk')
_('a worm')
_('rustle.')
_('a zombie')
_('shuffling.')
_('a robot')
_('mechanical whirring.')
_('a horror')
_('an aberration')
_('a human')
_('shlop.')
_('pop.')
_('tac.')
_('pat.')
_('shlip.')