Allow updater capabilities.

Author: nedtwigg

standalone/src-tauri/capabilities/default.json

@@ -12,6 +12,7 @@
     "shell:allow-spawn",
     "shell:allow-stdin-write",
     "shell:allow-kill",
-    "shell:allow-open"
+    "shell:allow-open",
+    "updater:default"
   ]
 }