CheckVowels.java hasVowels() method wrong

[aldotele]

Describe the bug
In strings\CheckVowels.java, the hasVowels method might be wrong

To Reproduce
Steps to reproduce the behavior:

Create a test method and perform the following assertion:
Assertions.assertTrue(CheckVowels.hasVowels("Hello World"));
It will fail even if the sentence contains vowels

[acbin]

Hi, I will fix the issue