Fix sortVariationsByLabel logic

[juliabrzvtex]

Se option.label não é um número, Number.isNaN(option.label) retorna false, e o operador ! inverte isso para true. Portanto, qualquer valor não numérico ou válido será considerado "não-NaN" e fará o teste every retornar true indevidamente.

A lógica foi alterada para !isNaN(Number(option.label)

What problem is this solving?

A prop sortVariationsByLabel não estava funcional

How to test it?

Set the prop sortVariationsByLabel on sku-selector block to true

Screenshots or example usage:

Before
https://hanesdev--hanes.myvtex.com/0mhb005/p?skuId=180

After

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