docs(README): fix docs typo (redis#1385)

README.md

@@ -755,7 +755,7 @@ const redis = new Redis({
 
 This feature is useful when using Amazon ElastiCache instances with Auto-failover disabled. On these instances, test your `reconnectOnError` handler by manually promoting the replica node to the primary role using the AWS console. The following writes fail with the error `READONLY`. Using `reconnectOnError`, we can force the connection to reconnect on this error in order to connect to the new master. Furthermore, if the `reconnectOnError` returns `2`, ioredis will resend the failed command after reconnecting.
 
-On ElastiCache insances with Auto-failover enabled, `reconnectOnError` does not execute. Instead of returning a Redis error, AWS closes all connections to the master endpoint until the new primary node is ready. ioredis reconnects via `retryStrategy` instead of `reconnectOnError` after about a minute. On ElastiCache insances with Auto-failover enabled, test failover events with the `Failover primary` option in the AWS console.
+On ElastiCache instances with Auto-failover enabled, `reconnectOnError` does not execute. Instead of returning a Redis error, AWS closes all connections to the master endpoint until the new primary node is ready. ioredis reconnects via `retryStrategy` instead of `reconnectOnError` after about a minute. On ElastiCache instances with Auto-failover enabled, test failover events with the `Failover primary` option in the AWS console.
 
 ## Connection Events