Bump electron from 26.1.0 to 26.2.1 in /src-frontend

Bumps [electron](https://github.com/electron/electron) from 26.1.0 to 26.2.1.
- [Release notes](https://github.com/electron/electron/releases)
- [Changelog](https://github.com/electron/electron/blob/main/docs/breaking-changes.md)
- [Commits](electron/electron@v26.1.0...v26.2.1)

---
updated-dependencies:
- dependency-name: electron
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

src-frontend/package.json

@@ -73,7 +73,7 @@
     "autoprefixer": "^10.4.2",
     "babel-eslint": "^10.0.1",
     "devtron": "^1.4.0",
-    "electron": "^26.1.0",
+    "electron": "^26.2.1",
     "electron-debug": "^3.1.0",
     "electron-devtools-installer": "^3.0.0",
     "electron-packager": "^17.1.2",