Update CODEOWNERS (#19)

This pull request updates the code ownership settings for the
repository. The change adds `@gasperzgonec` as a code owner alongside
the existing owners.

Related issue: https://app.devrev.ai/devrev/works/ISS-202007

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: patricijabrecko

.github/CODEOWNERS

@@ -1 +1 @@
-- @radovanjorgic @patricijabrecko @devrev/airdrop
+* @radovanjorgic @patricijabrecko @gasperzgonec @devrev/airdrop