Set snap base to core22 for newer Mesa/GPU support

The snap defaults to core20 (Ubuntu 20.04) which bundles Mesa drivers
too old for newer GPUs (e.g. Intel Arrow Lake 8086:64a0). Setting base
to core22 pulls in the Ubuntu 22.04 GNOME platform snap with updated
Mesa drivers, fixing segfaults on launch.

Fixes #2614

package.json

@@ -481,6 +481,7 @@
       ]
     },
     "snap": {
+      "base": "core22",
       "plugs": [
         "default",
         "removable-media"