chore(deps): bump cert-manager::devops-stack-module-cert-manager

Bumps [cert-manager::devops-stack-module-cert-manager](https://github.com/camptocamp/devops-stack-module-cert-manager) from 8.5.0 to 8.6.0.
- [Release notes](https://github.com/camptocamp/devops-stack-module-cert-manager/releases)
- [Changelog](https://github.com/camptocamp/devops-stack-module-cert-manager/blob/main/CHANGELOG.md)
- [Commits](camptocamp/devops-stack-module-cert-manager@v8.5.0...v8.6.0)

---
updated-dependencies:
- dependency-name: cert-manager::github::camptocamp/devops-stack-module-cert-manager::v8.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

examples/sks/main.tf

@@ -50,7 +50,7 @@ module "traefik" {
 }
 
 module "cert-manager" {
-  source = "git::https://github.com/camptocamp/devops-stack-module-cert-manager.git//sks?ref=v8.5.0"
+  source = "git::https://github.com/camptocamp/devops-stack-module-cert-manager.git//sks?ref=v8.6.0"
 
   argocd_project = module.sks.cluster_name