Update dependency rollup to v3.20.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	3.20.0 -> 3.20.1

---

Release Notes

rollup/rollup

### [`v3.20.1`](https://togithub.com/rollup/rollup/blob/HEAD/CHANGELOG.md#​3201) [Compare Source](https://togithub.com/rollup/rollup/compare/v3.20.0...v3.20.1) *2023-03-23* ##### Bug Fixes - Fix returned file name from this.getFileName when assets are deduplicated ([#​4919](https://togithub.com/rollup/rollup/issues/4919)) ##### Pull Requests - [#​4919](https://togithub.com/rollup/rollup/pull/4919): Only set asset names when finalizing ([@​lukastaegert](https://togithub.com/lukastaegert))

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.