Merge branch 'docs/fix-pleroma-api-title' into 'develop'

docs/Pleroma-API.md: Fix ex_doc title by changing the first h1 to it

See merge request !736

docs/Pleroma-API.md

-# Authentication
+# Pleroma API
 
 Requests that require it can be authenticated with [an OAuth token](https://tools.ietf.org/html/rfc6749), the `_pleroma_key` cookie, or [HTTP Basic Authentication](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Authorization).
 
-# Request parameters
-
 Request parameters can be passed via [query strings](https://en.wikipedia.org/wiki/Query_string) or as [form data](https://www.w3.org/TR/html401/interact/forms.html). Files must be uploaded as `multipart/form-data`.
 
-# Endpoints
-
 ## `/api/pleroma/emoji`
 ### Lists the custom emoji on that server.
 * Method: `GET`