chore(deps): update devdependency @sveltejs/vite-plugin-svelte to v6

Author: renovate[bot]

packages/svelte/package.json

@@ -27,7 +27,7 @@
     "@sveltejs/adapter-auto": "^7.0.0",
     "@sveltejs/kit": "^2.16.0",
     "@sveltejs/package": "^2.3.7",
-    "@sveltejs/vite-plugin-svelte": "^5.0.3",
+    "@sveltejs/vite-plugin-svelte": "^6.2.4",
     "@testing-library/svelte": "^5.2.6",
     "prettier": "^3.4.2",
     "svelte": "^5.45.6",