Update exercises/square-root/instructions.md

Co-authored-by: Anastasios Chatzialexiou <[email protected]>

Author: xanni

exercises/square-root/instructions.md

@@ -3,7 +3,7 @@
 Your task is to calculate the square root of a given number.
 
 - Try to avoid using the pre-existing math libraries of your language.
-- As input you’ll be given a positive whole number, i.e. 1, 2, 3, 4…
+- As input you'll be given a positive whole number, i.e. 1, 2, 3, 4…
 - You also only need to return a positive whole number.
 
 Some potential approaches: