Updated README.md
added link back to the articles:
- [Check if a String Ends with a Certain Pattern in Java](https://www.baeldung.com/java-string-ends-pattern)
- [Check if a Character is a Vowel in Java](https://www.baeldung.com/java-check-character-vowel)
- [How to Truncate a String in Java](https://www.baeldung.com/java-truncating-strings)
+- [Remove Whitespace From a String in Java](https://www.baeldung.com/java-string-remove-whitespace)
