Issue #159: Replace sleep 30 with terminus workflow:wait

[justafish]

No description provided.

[mrdavidburns]

@justafish multiple checks are failing with this error.

Status: Downloaded newer image for ddev/ddev-traefik-router:v1.22.7
docker.io/ddev/ddev-traefik-router:v1.22.7
Failed to start drainpipe: yaml: line 153: mapping values are not allowed in this context
Error: Process completed with exit code 1.

That doesn't seem to be related to any change in this pull request. Is it okay to ignore this? Should we open a separate ticket to fix?

[justafish]

@mrdavidburns yeah it's been doing that a bit lately, re-running the test seems to fix it 🤷