fix: fix session_locking_strategy enum typos

etc/emqx.conf

@@ -2041,7 +2041,7 @@ broker.sys_heartbeat = 30s
 ##
 ## Value: Enum
 ## - local
-## - one
+## - leader
 ## - quorum
 ## - all
 broker.session_locking_strategy = quorum

src/emqx_cm_locker.erl

@@ -60,7 +60,7 @@ lock(ClientId, Piggyback) ->
 unlock(ClientId) ->
     ekka_locker:release(?MODULE, ClientId, strategy()).
 
--spec(strategy() -> local | one | quorum | all).
+-spec(strategy() -> local | leader | quorum | all).
 strategy() ->
     emqx:get_env(session_locking_strategy, quorum).