Fix typo in Project Euler sol1.py (TheAlgorithms#1875)

Author: SandersLin

project_euler/problem_31/sol1.py

@@ -45,7 +45,7 @@ def two_pound(x):
 
 
 def solution(n):
-    """Returns the number of different ways can £n be made using any number of
+    """Returns the number of different ways can n pence be made using any number of
     coins?
 
     >>> solution(500)