npm-dep: bump svelte from 5.53.11 to 5.53.12 in /frontend

Bumps [svelte](https://github.com/sveltejs/svelte/tree/HEAD/packages/svelte) from 5.53.11 to 5.53.12.
- [Release notes](https://github.com/sveltejs/svelte/releases)
- [Changelog](https://github.com/sveltejs/svelte/blob/main/packages/svelte/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/svelte/commits/svelte@5.53.12/packages/svelte)

---
updated-dependencies:
- dependency-name: svelte
  dependency-version: 5.53.12
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

frontend/package.json

@@ -31,7 +31,7 @@
 		"prettier": "^3.8.1",
 		"prettier-plugin-svelte": "^3.5.1",
 		"prettier-plugin-tailwindcss": "^0.7.2",
-		"svelte": "^5.53.11",
+		"svelte": "^5.53.12",
 		"svelte-check": "^4.4.5",
 		"tailwindcss": "^4.2.1",
 		"tslib": "^2.8.1",