Update README.md

'Create a ZIP File in Kotlin' added

Author: kwasibaeldung

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

@@ -5,3 +5,4 @@
 - [Delete Files and Subdirectories in a Directory in Kotlin](https://www.baeldung.com/kotlin/delete-directories-with-contents)
 - [Convert File to Byte Array in Kotlin](https://www.baeldung.com/kotlin/file-byte-array)
 - [How to Create a Temporary File in Kotlin](https://www.baeldung.com/kotlin/temp-file)
+- [Create a ZIP File in Kotlin](https://www.baeldung.com/kotlin/zip-file)