Remove duplicate word in design document

**What happened:** [A clear and concise description of what the bug is.] https://github.com/fidelity/kconnect/blob/main/docs/proposals/20200607-initial-design.md Design document contains duplicate word **choosing** **What did you expect to happen:** Remove duplicate word choosing from design document you can choose to regenerate the kubeconfig by **choosing choosing** a item from your history **How to reproduce it:** **Anything else you would like to add:** [Miscellaneous information that will assist in solving the issue.] **Environment:** - kconnect version (use `kconnect version`): - Kubernetes version (use `kubectl version`): - OS (e.g. from `/etc/os-release`): - Target environment (e.g. EKS, AKS, Rancher): - Authentication Used (e.g. SAML, IAM, Azure AD):