Fix pool sub example

README.md

@@ -140,16 +140,14 @@ let relays = ['wss://relay.example.com', 'wss://relay.example2.com']
 
 let relay = await pool.ensureRelay('wss://relay.example3.com')
 
-let subs = pool.sub([...relays, relay], {
+let sub = pool.sub([...relays, relay], [{
   authors: ['32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245']
-})
+}])
 
-subs.forEach(sub =>
-  sub.on('event', event => {
+sub.on('event', event => {
   // this will only be called once the first time the event is received
   // ...
-  })
-)
+})
 
 let pubs = pool.publish(relays, newEvent)
 pubs.forEach(pub =>