Clarification needed: "export default" restriction phrasing

[Ali-Amir-code]

Description: In the Import/Export section, under Export Default, the documentation states:
"There may be only one export default per file."

This wording could be misleading, as it implies optionality. To avoid confusion, I suggest rephrasing it to:
"There must be only one export default per file."

This phrasing more accurately reflects the restriction in JavaScript that a file cannot have more than one export default.

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