bump to 0.15.0-beta.2 (#761)

package.json

 {
   "name": "dyad",
   "productName": "dyad",
-  "version": "0.15.0-beta.1",
+  "version": "0.15.0-beta.2",
   "description": "My Electron application description",
   "main": ".vite/build/main.js",
   "repository": {