Add Capsule project to the list

[Alessio Greggi]

Capsule

Definition

Capsule is a multi-tenancy and policy-based framework for Kubernetes.
You can find more information here: https://github.com/clastix/capsule

Proposed solution

Add Capsule to the Kubernetes projects list.

[Bogomil Shopov - Бого]

You can add it yourself :) @alegrey91