[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

maths/armstrong_number.py

@@ -20,4 +20,4 @@ def is_armstrong(num: int) -> bool:
     if is_armstrong(number):
         print(f"{number} is an Armstrong number.")
     else:
-        print(f"{number} is not an Armstrong number.")
+        print(f"{number} is not an Armstrong number.")