Fix incorrectly named formes in spriteset

[NoelDavies]

Initially issue detected in ./assets/pokemon/s-m

Expected:
Alolan forms should match with formes, defined in defaultSettings.js

// regional forms
    'rattata': { 'alola': 'rattata-alola' },
    'raticate': { 'alola': 'raticate-alola' },
    'raichu': { 'alola': 'raichu-alola' },
    'sandshrew': { 'alola': 'sandshrew-alola' },
    'sandslash': { 'alola': 'sandslash-alola' },
    'vulpix': { 'alola': 'vulpix-alola' },
    'ninetales': { 'alola': 'ninetales-alola' },
    'diglett': { 'alola': 'diglett-alola' },
    'dugtrio': { 'alola': 'dugtrio-alola' },
    'persian': { 'alola': 'persian-alola' },
    'geodude': { 'alola': 'geodude-alola' },
    'graveler': { 'alola': 'graveler-alola' },
    'golem': { 'alola': 'golem-alola' },
    'grimer': { 'alola': 'grimer-alola' },
    'exeggutor': { 'alola': 'exeggutor-alola' },
    'marowak': { 'alola': 'marowak-alola' },

Actual:
Alolan forms had the suffix of -a instead of -alola.

Next Steps:

• Check if issue is in prod
• Rename files in s-m
• Search for any other occurrences of this issue