Update CODEOWNER usernames

Author: bbhtt

CODEOWNERS

@@ -2,7 +2,7 @@
 *                  @flathub/reviewers
 
 update-checker.sh  @orowith2os @flathub/reviewers
-.github/workflows/update.yaml @orowith2os @flathub/reviewers
+.github/ @flathub/reviewers
 
 /dbus-glib/        @TingPing
 /clutter/          @A6GibKm
@@ -21,6 +21,6 @@ update-checker.sh  @orowith2os @flathub/reviewers
 /gzdoom/           @Eonfge
 /vorbisgain/       @Eonfge
 /luajit/           @ranisalt
-/lzo/              @ZVNexus
-/squashfs-tools/   @ZVNexus
-/libayatana-appindicator/  @ZVNexus
+/lzo/              @AKoskovich
+/squashfs-tools/   @AKoskovich
+/libayatana-appindicator/  @AKoskovich