/querier.v1.QuerierService/Diff api failing over http

#### Describe the bug
Running into 404 errors when trying to access the profile diff api over HTTP https://grafana.com/docs/pyroscope/latest/reference-server-api/#querierv1querierservicediff

Has the http endpoint changed from the docs?

All of the other endpoints on these docs work.

#### Expected behavior

Expected to receive returned data similar to other APIs on this page, instead got 404 error.

#### Environment

Fails even with just a simple curl command.
#### Additional Context