fix(helm): update cert-manager ( v1.15.1 → v1.15.2 )

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
cert-manager (source)	patch	v1.15.1 -> v1.15.2

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Release Notes

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

### [`v1.15.2`](https://togithub.com/cert-manager/cert-manager/compare/v1.15.1...v1.15.2-alpha.0) [Compare Source](https://togithub.com/cert-manager/cert-manager/compare/v1.15.1...v1.15.2)

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