weightedArrayElement does not mention the possibility to throw in it's docs

[xDivisionByZerox]

Description

Our coding guidelines for JSDocs state that a faker function that is able throw should that that in their JSDocs.

faker/CONTRIBUTING.md

Line 362 in bbd1693

> If a function can throw an error (FakerError) you have to include the `@throws` tag with an explanation when an error could be thrown

While reviewing #3857 I noticed that faker.helpers.weightedArrayElement does not have any throw comments, while clearly having possible errors being thrown during runtime:

faker/src/modules/helpers/module.ts

Lines 984 to 994 in bbd1693

	if (array.length === 0) {
	throw new FakerError(
	'weightedArrayElement expects an array with at least one element'
	);
	}
	if (array.some((elt) => elt.weight <= 0)) {
	throw new FakerError(
	'weightedArrayElement expects an array of { weight, value } objects where weight is a positive number'
	);
	}

Task

Add JSDocs stating that the function can throw as described in our guidelines.

[Zer0codestuff]

I'd like to work on this. I'll add the missing JSDoc throw conditions, run the focused checks, and keep the change limited to the documented behavior.