chore(deps): bump metallb::devops-stack-module-metallb in /examples/kind

Bumps [metallb::devops-stack-module-metallb](https://github.com/camptocamp/devops-stack-module-metallb) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/camptocamp/devops-stack-module-metallb/releases)
- [Changelog](https://github.com/camptocamp/devops-stack-module-metallb/blob/main/CHANGELOG.md)
- [Commits](camptocamp/devops-stack-module-metallb@v1.3.0...v1.4.0)

---
updated-dependencies:
- dependency-name: metallb::github::camptocamp/devops-stack-module-metallb::v1.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

examples/kind/main.tf

@@ -6,7 +6,7 @@ module "kind" {
 }
 
 module "metallb" {
-  source = "git::https://github.com/camptocamp/devops-stack-module-metallb.git?ref=v1.3.0"
+  source = "git::https://github.com/camptocamp/devops-stack-module-metallb.git?ref=v1.4.0"
 
   subnet = module.kind.kind_subnet
 }