"Update Deps and Codegen" action takes long time

Since knative and knative-sandbox have a lot of repositories, the "[Update Deps and Codegen](https://github.com/knative-sandbox/knobots/actions/runs/1578318186)" action takes too long time.
It is no problem on normal days but we need to kick the action at least twice on the release day and it blocks our work.

Is it not alright to split some repositories (e.g. knative and knative-sandbox) for the action OR increase max-parallel?:

https://github.com/knative-sandbox/knobots/blob/aeeeea502d70b076485f34c1e348c1101a46391a/.github/workflows/auto-update-deps.yaml#L68

Start with .github/workflows/auto-update-deps.yaml at line 68 and inspect the linked Update Deps and Codegen action run. Compare splitting knative and knative-sandbox repositories with increasing max-parallel, then verify that release-day runs complete faster without blocking subsequent work.

Written by the indexing model from the issue text.