fix(helm): update chart cert-manager to v1.12.3

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
cert-manager	patch	v1.12.2 -> v1.12.3

---

Release Notes

cert-manager/cert-manager (cert-manager)

### [`v1.12.3`](https://togithub.com/cert-manager/cert-manager/releases/tag/v1.12.3) [Compare Source](https://togithub.com/cert-manager/cert-manager/compare/v1.12.2...v1.12.3) #### Changes by Kind ##### Bugfixes - BUGFIX\[cainjector]: 1-character bug was causing invalid log messages and a memory leak ([#​6235](https://togithub.com/cert-manager/cert-manager/issues/6235), [@​jetstack-bot](https://togithub.com/jetstack-bot))

---

Configuration

📅 Schedule: Branch creation - "on saturday" (UTC), 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.