Update API docs

docs/api.md

@@ -30,6 +30,12 @@ Finally, **system information and configuration** is available via a set of spec
 
 Here major and breaking changes to the API are listed by version.
 
+### ODK Central v2023.4
+
+**Added**:
+
+- [DELETE /sessions/current](/reference/authentication/session-authentication/logging-out-current-session) logs out the current session.
+
 ### ODK Central v2023.3
 
 **Added**:
@@ -387,7 +393,7 @@ _(There is not really anything at `/v1/example`; this section only demonstrates
 
 #### Logging out [DELETE /v1/sessions/{token}]
 
-Logging out is not strictly necessary for Web Users; all sessions expire 24 hours after they are created. But it can be a good idea, in case someone else manages to steal your token. It is also the way Public Link and App User access is revoked. To do so, issue a `DELETE` request to that token resource.
+Logging out is not strictly necessary for Web Users; all sessions expire 24 hours after they are created. But it can be a good idea, in case someone else manages to steal your token. It is also the way Public Link and App User access are revoked. To do so, issue a `DELETE` request to that token resource.
 
 + Parameters
     + token: `lSpAIeksRu1CNZs7!qjAot2T17dPzkrw9B4iTtpj7OoIJBmXvnHM8z8Ka4QPEjR7` (string, required) - The session bearer token, obtained at login time.
@@ -420,9 +426,6 @@ Only the session that was used to authenticate the request is logged out. If the
 + Response 403 (application/json)
     + Attributes (Error 403)
 
-+ Response 404 (application/json)
-    + Attributes (Error 404)
-
 ## HTTPS Basic Authentication [/v1/example]
 
 Standard HTTP Basic Authentication is allowed, but **_strongly discouraged_**. This is because the server must verify your password with every single request, which is very slow to compute: typically, this will add hundreds of milliseconds to each request. For some one-off tasks and in cases where there is no other choice, it is reasonable to choose Basic authentication, but wherever possible we strongly encourage the use of any other authentication method.