docs(image): incorrectly typed example in personPortrait

[ST-DDT]

faker/src/modules/image/module.ts

Line 71 in 2cb0423

* faker.image.personPortrait({ sex: 'male', size: '128' }) // 'https://cdn.jsdelivr.net/gh/faker-js/assets-person-portrait/male/128/27.jpg'

Type 'string' is not assignable to type '512 | 256 | 128 | 64 | 32 | undefined'.

-faker.image.personPortrait({ sex: 'male', size: '128' })
+faker.image.personPortrait({ sex: 'male', size: 128 })

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Blocked by #3748