It is a matter of fashion and style. The double quotation mark was standard until around 1960 when the single quote began to come in. At the time it was said to be more efficient to use the single quote as you did not need to use the shift key on a typewriter, so could type quicker. Frankly, like so many things, if you are an efficient and rapid typist, it makes very little difference.
However, it has become an accepted norm, but is not an absolute. If you prefer double quotes, then use them. Your choice.
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