Update 09_day_higher_order_functions.md

fix: add closing parenthesis in exercises section at 3lvl 4rd ex.

09_Day_Higher_order_functions/09_day_higher_order_functions.md

@@ -675,7 +675,7 @@ const products = [
    console.log('Sum: ', statistics.sum()) // 744
    console.log('Min: ', statistics.min()) // 24
    console.log('Max: ', statistics.max()) // 38
-   console.log('Range: ', statistics.range() // 14
+   console.log('Range: ', statistics.range()) // 14
    console.log('Mean: ', statistics.mean()) // 30
    console.log('Median: ',statistics.median()) // 29
    console.log('Mode: ', statistics.mode()) // {'mode': 26, 'count': 5}