Update metadata.json

- add support for gnome 47

gnome-extension/metadata.json

@@ -4,7 +4,7 @@
     "uuid": "[email protected]",
     "url": "https://github.com/ZanzyTHEbar/vscode-nautilus",
     "settings-schema": "org.gnome.shell.extensions.vscode-workspaces",
-    "shell-version": ["45", "46"],
+    "shell-version": ["45", "46", "47"],
     "donations": {
         "github": "ZanzyTHEbar"
     }