Swagger documentation: missing ols4/api/ontologies/ API

[lgatto]

Describe the bug

I think that the API to request all ontologies is missing.

Expected behavior

I would expect this to be documented:

curl -X 'GET' \
  'https://www.ebi.ac.uk/ols4/api/ontologies/?lang=en&page=0&size=1' \
  -H 'accept: application/json'