Update philipparndt/get-release-number action to v2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
philipparndt/get-release-number	action	major	v1 -> v2

---

Release Notes

philipparndt/get-release-number

### [`v2`](https://togithub.com/philipparndt/get-release-number/releases/tag/v2) [Compare Source](https://togithub.com/philipparndt/get-release-number/compare/v1...v2) Node 16

---

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.