Remove knl as maintainer for oauth2_proxy (#128483)

Co-authored-by: fortune <[e-mail]>
Co-authored-by: Nikola Knezevic <[e-mail]>

pkgs/servers/oauth2-proxy/default.nix

···
     description = "A reverse proxy that provides authentication with Google, Github, or other providers";
     homepage = "https://github.com/oauth2-proxy/oauth2-proxy/";
     license = licenses.mit;
-    maintainers = with maintainers; teams.serokell.members ++ [ knl ];
+    maintainers = teams.serokell.members;
   };
 }