chore(deps): bump thanos::devops-stack-module-thanos in /examples/sks

Bumps [thanos::devops-stack-module-thanos](https://github.com/camptocamp/devops-stack-module-thanos) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/camptocamp/devops-stack-module-thanos/releases)
- [Changelog](https://github.com/camptocamp/devops-stack-module-thanos/blob/main/CHANGELOG.md)
- [Commits](camptocamp/devops-stack-module-thanos@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: thanos::github::camptocamp/devops-stack-module-thanos::v5.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

examples/sks/main.tf

@@ -162,7 +162,7 @@ module "loki-stack" {
 }
 
 module "thanos" {
-  source = "git::https://github.com/camptocamp/devops-stack-module-thanos.git//sks?ref=v5.0.0"
+  source = "git::https://github.com/camptocamp/devops-stack-module-thanos.git//sks?ref=v6.0.0"
 
   cluster_name   = module.sks.cluster_name
   base_domain    = module.sks.base_domain