British Matcha

Some small tweaks to the en_GB lang file, localising the Matcha Flavoured datapack into British English.

Current Version (0.1, for MF 1.12, for MC 26.2):

• Armor > Armour
• Shakudo > Shakudō
• Empanada > Pasty
• Fetish > Idol

Matcha Flavoured is by Klei