npm-dep: bump prettier-plugin-svelte from 3.3.3 to 3.4.0 in /frontend

Bumps [prettier-plugin-svelte](https://github.com/sveltejs/prettier-plugin-svelte) from 3.3.3 to 3.4.0.
- [Changelog](https://github.com/sveltejs/prettier-plugin-svelte/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/prettier-plugin-svelte/commits)

---
updated-dependencies:
- dependency-name: prettier-plugin-svelte
  dependency-version: 3.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

frontend/package.json

@@ -29,7 +29,7 @@
 		"globals": "^15.15.0",
 		"husky": "^9.1.7",
 		"prettier": "^3.5.3",
-		"prettier-plugin-svelte": "^3.3.3",
+		"prettier-plugin-svelte": "^3.4.0",
 		"prettier-plugin-tailwindcss": "^0.6.11",
 		"svelte": "^5.28.6",
 		"svelte-check": "^4.2.0",