Update doc comment in JSTypedArray.swift

[MaxDesiatov]

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[github-actions]

Time Change: -30.5ms (0%)

Total Time: 12,044.25ms

ℹ️ View Unchanged

Test name	Duration	Change
Serialization/Write JavaScript number directly	221.25ms	+2.75ms (1%)
Serialization/Write JavaScript string directly	223.75ms	+5.75ms (2%)
Serialization/Swift Int to JavaScript	3,797.5ms	+46ms (1%)
Serialization/Swift String to JavaScript	3,958ms	-11.25ms (0%)
Object heap/Increment and decrement RC	3,843.75ms	-73.75ms (1%)

_{performance-action}