fix(charts): update helm release cert-manager to v1.15.1

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
cert-manager (source)	patch	v1.15.0 -> v1.15.1

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Release Notes

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

### [`v1.15.1`](https://togithub.com/cert-manager/cert-manager/compare/v1.15.0...v1.15.1) [Compare Source](https://togithub.com/cert-manager/cert-manager/compare/v1.15.0...v1.15.1)

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