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

The JSDoc comment states the valid position range is '1 to 75', but the code validates against topMaxValidPosition = 70.

This PR fixes the documentation to match the implementation.

Author: huizixin

src/algorithms/math/fibonacci/fibonacciNthClosedForm.js

@@ -2,7 +2,7 @@
  * Calculate fibonacci number at specific position using closed form function (Binet's formula).
  * @see: https://en.wikipedia.org/wiki/Fibonacci_number#Closed-form_expression
  *
- * @param {number} position - Position number of fibonacci sequence (must be number from 1 to 75).
+ * @param {number} position - Position number of fibonacci sequence (must be number from 1 to 70).
  * @return {number}
  */
 export default function fibonacciClosedForm(position) {