Update README.md

[skip ci]

Author: edizor

core-kotlin-modules/core-kotlin-8/README.md

@@ -2,4 +2,5 @@
 - [Dividing Two Int Objects and Getting a BigDecimal in Kotlin](https://www.baeldung.com/kotlin/divide-two-int-objects-bigdecimal-result)
 - [Check if a Number Is Positive or Negative in Kotlin](https://www.baeldung.com/kotlin/number-sign)
 - [An Introduction to KDoc](https://www.baeldung.com/kotlin/kdoc)
+- [Check Whether a Character Is a Vowel or Consonant in Kotlin](https://www.baeldung.com/kotlin/char-vowel-or-consonant)
 - More articles: [[<-- prev]](../core-kotlin-7)