This commit attemps to fix the flakiness that shows up sometimes
in the `components-repo-unit-tests` job. See:

https://app.circleci.com/pipelines/github/angular/angular/43024/workflows/fa9bc546-179a-4215-a7f1-db123efa0fa4/jobs/1126909

We updated Firefox/Chromium in dev-infra, hoping to fix this non-reproducable
flakiness (also checked memory/CPU consumption in the test). So far it looks like
the update helped in the COMP repo so we should try it here as well.

PR Close #45166