chore: add vtt file for map method video (#347)

Author: jdwilkin4

build/curriculum/labs/what-is-the-map-method-and-how-does-it-work.vtt

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+What is the map method and how does it work?
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+The map method is a powerful and widely used function in JavaScript that operates on arrays.
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+It is designed to create a new array by applying a given function to each element of the original array.
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+This method does not modify the original array, but instead returns a new array containing the results of the function applied to each element.
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+Here's an example of using the map method on an array of numbers.
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+To create a new array where each number is doubled, we are using the map method.
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+The map method accepts a callback function where the function is called on every single element in the array.
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+In this case, each number in the array will be multiplied by two.
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+The result will be a new array of the numbers 2, 4, 6, 8, 10.
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+The callback function can accept up to three arguments.
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+The first argument is the current element being processed.
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+The second argument is the index of the current element being processed.
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+The third argument is the array where map is being called on.
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+Understanding and effectively using the map method can significantly improve your ability to work with arrays in JavaScript.
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+In future lecture videos, we'll dive deeper into more advanced uses of map and explore how it can be a powerful tool for building.
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+Dynamic and efficient programs.