[MC-265583] Incorrect pluralization for skin customization strings for pants

The Bug:

The strings for pants customisation each refer to an individual pant leg as a left or right "Pants Leg". The correct way to say this is "Left Pant Leg" or Right Pant Leg".

Below is a table highlighting this error. You can find information about what the current and expected strings are and would be, some context regarding them, and a link to the appropriate string on Crowdin.

Affected String:

Before reading the table, please note the following:

Words & characters colored in GREEN are correct.
Words & characters colored in RED are incorrect.

Current String	Expected String	String Context	String URL on Crowdin
Left Pants Leg	Left Pant Leg	options.modelPart.left_pants_leg	https://crowdin.com/translate/minecraft/10038/enus-engb#5332942
Right Pants Leg	Right Pant Leg	options.modelPart.right_pants_leg	https://crowdin.com/translate/minecraft/10038/enus-engb#5332944

Steps to Reproduce:

Locate the affected string as listed above.
Take note as to whether or not this string is correctly pluralized.

Observed Behavior:

This string has grammatically incorrect pluralization.

Expected Behavior:

This string is grammatically correct.