API Updates (#24105)

* fix missing /api/v4 prefix for commands autocomplete suggestion

* document /api/v4/ldap/users/{user_id}/group_sync_memberships

* document /api/v4/groups/{group_id}/restore

* fix /files/{file_id}/public actually at root

* document /api/v4/users/invalid_emails

server/channels/api4/group.go

@@ -84,7 +84,7 @@ func (api *API) InitGroup() {
 	api.BaseRoutes.Groups.Handle("/{group_id:[A-Za-z0-9]+}",
 		api.APISessionRequired(deleteGroup)).Methods("DELETE")
 
-	// GET /api/v4/groups/:group_id
+	// POST /api/v4/groups/:group_id
 	api.BaseRoutes.Groups.Handle("/{group_id:[A-Za-z0-9]+}/restore",
 		api.APISessionRequired(restoreGroup)).Methods("POST")