Add @kubukoz

Author: kubukoz

_data/ambassadors.yml

@@ -126,3 +126,14 @@
   city: London, England
   discord: monmcguigan
   linkedin: https://www.linkedin.com/in/monica-mcguigan/
+
+- name: Jakub Kozłowski
+  description: Open-source contributor and maintainer, conference speaker and <a href="https://www.youtube.com/@kubukoz_">small-time YouTuber</a>.
+  image: https://github.com/kubukoz.png
+  city: Wrocław, Poland
+  discord: kubukoz
+  github: kubukoz
+  twitter: kubukoz
+  mastodon: https://mstdn.party/@kubukoz
+  linkedin: https://www.linkedin.com/in/%F0%9F%91%BE-jakub-koz%C5%82owski-5ab49542/
+