Schemathesis not running successful

[t-huyeng]

See: https://github.com/bundesAPI/autobahn-api/actions/runs/4477592901/jobs/7869311202

Mostly this:

1. The response is missing the `Content-Type` header. The schema defines the following media types:

    application/json

Response status: 200
Response payload: ``

Looks like it is because the roadId is wrong -> https://verkehr.autobahn.de/o/autobahn/A1%25/services/warning

A1%25 is not supported by the API so it returns nothing.