Added 3.12 to dependencies, in hope no major changes will come before the release.

data/metadata.json.in

@@ -1,8 +1,8 @@
 {
 "uuid": "@uuid@",
 "name": "Panel OSD",
-"shell-version": [ "3.6", "3.8", "3.10", "3.11.5", "3.11.90" ],
 "description": "Configuring where on the (main) screen notifications will appear, instead of just above the message tray",
+"shell-version": [ "3.6", "3.8", "3.10", "3.11.5", "3.11.90", "3.12" ],
 "localedir": "@LOCALEDIR@",
 "url": "@url@"
 }