fix(build/electron): hot fix for failing nightly electron builds

this is caused by recently reverting the output of "build:prepare-dist" from "dist" to "build"

-> this is just a temporary fix -> I am working in parallel already on an improved electron-forge build process, whihc will be ready by end of the week

package.json

@@ -4,7 +4,7 @@
   "description": "Build your personal knowledge base with TriliumNext Notes",
   "version": "0.92.3-beta",
   "license": "AGPL-3.0-only",
-  "main": "./dist/electron-main.js",
+  "main": "./build/electron-main.js",
   "author": {
     "name": "TriliumNext Notes Team",
     "email": "contact@eliandoran.me",