Build(deps-dev): Bump @electron-forge/core from 6.2.1 to 6.4.2 (#1829)

Bumps [@electron-forge/core](https://github.com/electron/forge) from 6.2.1 to 6.4.2.
- [Release notes](https://github.com/electron/forge/releases)
- [Changelog](https://github.com/electron/forge/blob/main/CHANGELOG.md)
- [Commits](electron/forge@v6.2.1...v6.4.2)

---
updated-dependencies:
- dependency-name: "@electron-forge/core"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

electron-app/package.json

@@ -35,7 +35,7 @@
   },
   "devDependencies": {
     "@electron-forge/cli": "^6.4.2",
-    "@electron-forge/core": "^6.2.1",
+    "@electron-forge/core": "^6.4.2",
     "@electron-forge/maker-deb": "^6.4.2",
     "@electron-forge/maker-dmg": "^6.4.2",
     "@electron-forge/maker-squirrel": "^6.4.1",