Bump svelte from 5.53.0 to 5.53.6 in /installer-gui

Bumps [svelte](https://github.com/sveltejs/svelte/tree/HEAD/packages/svelte) from 5.53.0 to 5.53.6.
- [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@5.53.6/packages/svelte)

---
updated-dependencies:
- dependency-name: svelte
  dependency-version: 5.53.6
  dependency-type: direct:development
...

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

installer-gui/package.json

@@ -33,7 +33,7 @@
         "globals": "^16.4.0",
         "prettier": "^3.6.2",
         "prettier-plugin-svelte": "^3.4.0",
-        "svelte": "^5.53.0",
+        "svelte": "^5.53.6",
         "svelte-check": "^4.0.0",
         "typescript": "~5.6.2",
         "typescript-eslint": "^8.46.2",