Remove duplicate word in design document

[AnshuChadha]

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):

[puneetgared]

Working on this one