deps: Upgrade electron-builder to v23.6.0

  This is the latest version of the v23.x major version, including a fix
  to the macOS `dmg` generation, introduced in v23.0.6 (see
  electron-userland/electron-builder#6789), that
  should allow us to build on Github Actions again.

Author: taratatach

package.json

@@ -139,7 +139,7 @@
     "del": "^6.0.0",
     "devtron": "^1.4.0",
     "electron": "19.0.0",
-    "electron-builder": "^22.14.13",
+    "electron-builder": "^23.6.0",
     "electron-download": "^4.1.1",
     "electron-mocha": "11.0.2",
     "electron-notarize": "^0.1.1",