deps: bump cert-manager Helm chart to v1.18.2

[github-actions]

deps: bump cert-manager version

Update cert-manager/manifest.yaml

change detected: * key "$.version" updated from "v1.18.1" to "v1.18.2", in file "cert-manager/manifest.yaml"

v1.18.1

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

We have added a new feature gate `ACMEHTTP01IngressPathTypeExact`, to allow `ingress-nginx` users to turn off the new default Ingress `PathType: Exact` behavior, in ACME HTTP01 Ingress challenge solvers.
This change fixes the following issue: #7791

We have increased the ACME challenge authorization timeout to two minutes, which we hope will fix a timeout error (`error waiting for authorization`), which has been reported by multiple users, since the release of cert-manager `v1.16.0`.
This change should fix the following issues: #7337, #7444, and #7685.

> ℹ️ Be sure to review all new features and changes below, and read the [full release notes](https://cert-manager.io/docs/releases/release-notes/release-notes-1.18) carefully before upgrading.

Changes since `v1.18.0`:

### Feature

- Added a new feature gate `ACMEHTTP01IngressPathTypeExact`, to allow `ingress-nginx` users to turn off the new default Ingress `PathType: Exact` behavior, in ACME HTTP01 Ingress challenge solvers. ([`#7810`](https://github.com/cert-manager/cert-manager/pull/7810), @sspreitzer)

### Bug or Regression

- ACME: Increased challenge authorization timeout to 2 minutes to fix `error waiting for authorization`. ([`#7801`](https://github.com/cert-manager/cert-manager/pull/7801), @hjoshi123)

### Other (Cleanup or Flake)

- Use the latest version of ingress-nginx in E2E tests to ensure compatibility ([`#7807`](https://github.com/cert-manager/cert-manager/pull/7807), @wallrj)

v1.18.2

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

We fixed a bug in the CSR's name constraints construction (only applies if you have enabled the `NameConstraints` feature gate).
We dropped the new `global.rbac.disableHTTPChallengesRole` Helm option due to a bug we found, this feature will be released in `v1.19` instead.

Changes since `v1.18.1`:

### Bug or Regression

- BUGFIX: permitted URI domains were incorrectly used to set the excluded URI domains in the CSR's name constraints (#7833, @cert-manager-bot)
- Reverted adding the `global.rbac.disableHTTPChallengesRole` Helm option. (#7837, @cert-manager-bot)

Update cert-manager/install.sh

1 file(s) updated with "/download/v1.18.2/": * cert-manager/install.sh

v1.18.2

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

We fixed a bug in the CSR's name constraints construction (only applies if you have enabled the `NameConstraints` feature gate).
We dropped the new `global.rbac.disableHTTPChallengesRole` Helm option due to a bug we found, this feature will be released in `v1.19` instead.

Changes since `v1.18.1`:

### Bug or Regression

- BUGFIX: permitted URI domains were incorrectly used to set the excluded URI domains in the CSR's name constraints (#7833, @cert-manager-bot)
- Reverted adding the `global.rbac.disableHTTPChallengesRole` Helm option. (#7837, @cert-manager-bot)

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