Update rest-api-spec 8.x

[github-actions]

As titled.

[l-trotta]

@lcawl is this correct? in the schema json I'm seeing some "extDocUrl" with "current" branch, others with "{branch}"

[lcawl]

@lcawl is this correct? in the schema json I'm seeing some "extDocUrl" with "current" branch, others with "{branch}"

This URL should be derived from the tables.csv file (

elasticsearch-specification/specification/_doc_ids/table.csv

Line 200 in fa24e21

field-and-document-access-control,https://www.elastic.co/guide/en/elasticsearch/reference/{branch}/field-and-document-access-control.html

) so that looks right to me. We updated 9.0 and main branch to temporarily use current explicitly because there are no 9.0 or master docs at this moment while we migrate to the new docs system.

[pquentin]

Approving based on Lisa's comment