Bug Report: Browser Extension showing existing private repos as "not found"

Created by: abeatrix

• Sourcegraph version: 3.32
• Platform information: Web - Chrome
• Browser Extension version: v21.10.15.1603

Steps to reproduce:

1. Set https://k8s.sgdev.org/ as Sourcegraph self-hosted URL in the browser extension
2. Go to a private repo https://github.com/sourcegraph/kube-backup for example

Expected behavior:

No error about repo not found.

Actual behavior:

• Repo shown as not found so code-intel would not work in that repo, when the repo actually exists in the private instance.
• Clicking on the "repo not found" button actually takes me to the correct repo in the private instance
• Repo that does not exist in the private repo will not get the sourcegraph button showing up at all. Example repo: https://github.com/sourcegraph/deploy-sourcegraph-updater-test