Bump svelte from 4.2.19 to 5.1.9 in /templates/svelte-basic

Bumps [svelte](https://github.com/sveltejs/svelte/tree/HEAD/packages/svelte) from 4.2.19 to 5.1.9.
- [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/[email protected]/packages/svelte)

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

Signed-off-by: dependabot[bot] <[email protected]>

templates/svelte-basic/package.json

@@ -16,7 +16,7 @@
     "rollup-plugin-css-only": "^4",
     "rollup-plugin-livereload": "^2.0.0",
     "rollup-plugin-svelte": "^7.2.0",
-    "svelte": "^4.0.0",
+    "svelte": "^5.1.9",
     "sirv-cli": "^2.0.0"
   }
 }