message: Fix TL;DR typo
diff: - Secure authentication to Kubeapps using an [OAuth2/OIDC provider](https://github.com/kubeapps/kubeapps/blob/master/docs/user/using-an-OIDC-provider.md)
  - Secure authorization based on Kubernetes [Role-Based Access Control](https://github.com/kubeapps/kubeapps/blob/master/docs/user/access-control.md)
  -## TL;DR;
  +## TL;DR
  For Helm 2:
  