fix: correct JSDoc position range to match code validation (1-70)

[huizixin]

Description

The JSDoc comment for fibonacciClosedForm() states the valid position range is "1 to 75", but the code validates against topMaxValidPosition = 70.

// Current JSDoc (line 7)
@param {number} position - Position number of fibonacci sequence (must be number from 1 to 75).

// Actual validation (line 10)
const topMaxValidPosition = 70;

Changes

• Updated JSDoc @param description to reflect the actual valid range (1 to 70)

Verification

The error message in the code already correctly uses the topMaxValidPosition variable:

throw new Error(`Can't handle position smaller than 1 or greater than ${topMaxValidPosition}`);

This PR only fixes the documentation to match the implementation.