fix(clustering/rpc): fix mistake of stop timer

kong/clustering/services/sync/init.lua

@@ -76,7 +76,7 @@ function _M:init_worker()
     -- cp does not support kong.sync.v2
     if not has_sync_v2 then
       ngx.log(ngx.WARN, "rpc sync is disabled in CP.")
-      assert(self.rpc:sync_every(EACH_SYNC_DELAY), true)  -- stop timer
+      assert(self.rpc:sync_every(EACH_SYNC_DELAY, true)) -- stop timer
       return
     end
 
@@ -89,7 +89,7 @@ function _M:init_worker()
 
   -- if rpc is down we will also stop to sync
   worker_events.register(function()
-    assert(self.rpc:sync_every(EACH_SYNC_DELAY), true)  -- stop timer
+    assert(self.rpc:sync_every(EACH_SYNC_DELAY, true))  -- stop timer
   end, "clustering:jsonrpc", "disconnected")
 end