Fix puppeteer timeouts on CI
CI builds often fail because the puppeteer front-end test times out.
Some examples:
- https://gitlab.com/timvisee/send/-/jobs/795248001
- https://gitlab.com/timvisee/send/-/jobs/795250975
- https://gitlab.com/timvisee/send/-/jobs/795265113
- https://gitlab.com/timvisee/send/-/jobs/795269855
- https://gitlab.com/timvisee/send/-/jobs/795270000
Increase this timeout to fix builds.