chore: add @adameat to CODEOWNERS as global owner (#2646)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: adameat <34044711+adameat@users.noreply.github.com>
Co-authored-by: Alexey Efimov <xeno@ydb.tech>

Author: Copilot

.github/CODEOWNERS

@@ -3,4 +3,4 @@
 # See: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
 
 # Global owners - these users will be requested for review on all PRs
-* @artemmufazalov @astandrik @Raubzeug
+* @artemmufazalov @astandrik @Raubzeug @adameat