Bump rollup in /svelte/svelte-motoko-starter/src/frontend (#1008)

Bumps [rollup](https://github.com/rollup/rollup) from 4.9.1 to 4.22.5.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.9.1...v4.22.5)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: indirect
...

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Author: dependabot[bot]