chore: bump version to 0.0.42 for the stable release

Stable published as v0.0.40 because the release workflow ships package.json's version as-is
when no matching tag exists. 0.0.40 is semver-BELOW the 0.0.41-beta.77 beta feed, so
electron-updater treated it as a downgrade and beta users stayed on 'latest version'
(confirmed in the app's Software update panel).

0.0.42 is above every 0.0.41-beta.* build, so a stable dispatch from here reaches beta
users and stable users alike.

Author: alichherawalla

package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "off-grid-ai",
   "productName": "Off Grid AI Desktop",
-  "version": "0.0.40",
+  "version": "0.0.42",
   "description": "Off Grid AI — a private, local-first AI that runs open models (text, vision, image, voice) entirely on your device. No cloud, no accounts.",
   "license": "AGPL-3.0-only",
   "main": "./out/main/index.js",