npm-dep: bump @typescript-eslint/eslint-plugin in /frontend

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 7.3.1 to 7.4.0.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v7.4.0/packages/eslint-plugin)

---
updated-dependencies:
- dependency-name: "@typescript-eslint/eslint-plugin"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

frontend/package.json

@@ -17,7 +17,7 @@
 	"devDependencies": {
 		"@sveltejs/adapter-static": "^2.0.3",
 		"@sveltejs/kit": "^1.30.4",
-		"@typescript-eslint/eslint-plugin": "^7.3.1",
+		"@typescript-eslint/eslint-plugin": "^7.4.0",
 		"@typescript-eslint/parser": "^7.4.0",
 		"autoprefixer": "^10.4.19",
 		"daisyui": "^4.9.0",