fix: upgrade firebase from 9.5.0 to 9.6.1

Snyk has created this PR to upgrade firebase from 9.5.0 to 9.6.1.

See this package in npm:
https://www.npmjs.com/package/firebase

See this project in Snyk:
https://app.snyk.io/org/bigcommerce/project/e8181de3-35cc-43e7-a8e2-368c6a93c24a?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot