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

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

Author: pre-commit-ci[bot]

strings/count_vowels.py

@@ -24,7 +24,6 @@ def count_vowels(s: str) -> int:
     if not isinstance(s, str):
         raise TypeError("Input must be a string")
 
-
     vowels = "aeiouAEIOU"
     return sum(1 for char in s if char in vowels)