Update insomnia to 2021.1.0

Summary: https://insomnia.rest/changelog#2021.1.0

Test Plan: Made a GET and a POST request to a REST API, created a openapi document and verified it render correctly.

Reviewers: Triage Team, JoshStrobl

Reviewed By: Triage Team, JoshStrobl

Subscribers: JoshStrobl

Differential Revision: https://dev.getsol.us/D10652