deps: bump cert-manager Helm chart to v1.15.1

[github-actions[bot]]

deps: bump cert-manager version

Update cert-manager/manifest.yaml

change detected: * key "$.version" updated from "v1.14.5" to "v1.15.1", in file "cert-manager/manifest.yaml"

v1.15.1

Release published on the 2024-06-26 17:50:17 +0000 UTC at the url https://github.com/cert-manager/cert-manager/releases/tag/v1.15.1

cert-manager is the easiest way to automatically manage certificates in Kubernetes and OpenShift clusters.

**🔗 [See v1.15.0](https://github.com/cert-manager/cert-manager/releases/tag/v1.15.0) for more information about cert-manager 1.15 and read-before-upgrade info.**

## 📜 Changes since [v1.15.0](https://github.com/cert-manager/cert-manager/releases/tag/v1.15.0)

### Bug or Regression

- BUGFIX: fix issue that caused Vault issuer to not retry signing when an error was encountered. (#7111, @inteon)

### Other (Cleanup or Flake)

- Update github.com/Azure/azure-sdk-for-go/sdk/azidentity to address CVE-2024-35255 (#7092, @ThatsMrTalbot)
- Bump the go-retryablehttp dependency to fix CVE-2024-6104 (#7130, @SgtCoDFish)

Update cert-manager/install.sh

1 file(s) updated with "/download/v1.15.1/": * cert-manager/install.sh

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