Update dependency electron to v39 [SECURITY]

Author: renovate[bot]

public/package.json

@@ -8,7 +8,7 @@
     "package": "electron-forge package"
   },
   "devDependencies": {
-    "electron": "^34.0.0",
+    "electron": "^39.0.0",
     "@electron-forge/cli": "^7.4.0"
   },
   "config": {