fixed docs links for datasets with a number (#836)

* fixed docs links for datasets with a number

* removed import for to_snake_case

---------

Co-authored-by: Barry Daniels <mail@barrydaniels.nl>

src/dso_api/dynamic_api/openapi.py

@@ -18,7 +18,6 @@
 from rest_framework.schemas import get_schema_view
 from rest_framework.views import APIView
 from schematools.contrib.django.models import Dataset
-from schematools.naming import to_snake_case
 from schematools.permissions import UserScopes
 from schematools.types import DatasetSchema
 
@@ -127,7 +126,7 @@ def get_openapi_json_view(dataset: Dataset):
         "externalDocs": {
             "url": urljoin(
                 settings.DATAPUNT_API_URL,  # to preserve hostname
-                f"/v1/docs/datasets/{to_snake_case(dataset_schema.id)}.html",
+                f"/v1/docs/datasets/{dataset.path}.html",
             )
         },
     }