Add Kravets Levko to codeowners (#386)

Signed-off-by: Levko Kravets <levko.ne@gmail.com>

Author: kravets-levko

.github/CODEOWNERS

@@ -2,4 +2,4 @@
 # the repo. Unless a later match takes precedence, these
 # users will be requested for review when someone opens a
 # pull request.
-*       @rcypher-databricks @arikfr @yunbodeng-db @andrefurlan-db @jackyhu-db @benc-db
+*       @rcypher-databricks @arikfr @yunbodeng-db @andrefurlan-db @jackyhu-db @benc-db @kravets-levko