Since the container embedded in our CI images is pinned, any update here
would result in the container having to be pulled again in CI
runs. Let's reduce the frequency that playwright gets updated, making it
easier to keep the container and the dependencies here somewhat in sync.
This bumps a maximum number of opened dependabot PRs as there are currently three open PRs in need of manual revision. Those are blocking any other bumps from being even opened.
The bump should be temporary.
