fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ELECTRON-3237489

Author: snyk-bot

package-lock.json

@@ -164,7 +164,7 @@
     "css-loader": "^5.2.4",
     "diff-so-fancy": "^1.3.0",
     "dotenv": "^16.0.3",
-    "electron": "^21.3.4",
+    "electron": "^21.3.5",
     "electron-builder": "23.5.0",
     "electron-notarize": "^1.2.1",
     "eslint": "^7.6.0",