Fix provider slug

1 job for master in 16 minutes and 16 seconds (queued for 123 minutes and 59 seconds)
latest
Status Job ID Name Coverage
  Build
failed #161760
docker
job

00:16:16

 
Name Stage Failure
failed
job Build
    r = adapter.send(request, **kwargs)
File "/usr/local/lib/python3.7/dist-packages/requests/adapters.py", line 507, in send
raise RetryError(e, request=request)
requests.exceptions.RetryError: HTTPSConnectionPool(host='sdmx.snieg.mx', port=443): Max retries exceeded with url: /Service/rest/dataflow/ (Caused by ResponseError('too many 500 error responses'))

real 16m0.860s
user 0m0.179s
sys 0m0.031s
ERROR: Job failed: exit code 1