🔔Notify Sviat of GHA changes through codeowners

This is a follow-up to getting the triage bit [[1]] as suggested by Petr
privately, prior to the nomination.

The patch is meant to ping me regarding any PRs that touch GitHub
Actions CI/CD instead of Petr doing so manually.

[1]: python/core-workflow#591

Author: webknjaz

.github/CODEOWNERS

@@ -63,7 +63,7 @@
 .azure-pipelines/             @AA-Turner
 
 # GitHub & related scripts
-.github/                               @ezio-melotti @hugovk @AA-Turner
+.github/                               @ezio-melotti @hugovk @AA-Turner @webknjaz
 Tools/build/compute-changes.py         @AA-Turner
 Tools/build/verify_ensurepip_wheels.py @AA-Turner @pfmoore @pradyunsg