Redundant limiter.poke in README.md (#141)

* Redundant limiter.poke in README.md

* Update README.md

---------

Co-authored-by: Ermolaev Andrey <[email protected]>

Author: ermolaev

README.md

@@ -166,14 +166,12 @@ limiter = Kredis.limiter "mylimit", limit: 3, expires_in: 5.seconds
 0 == limiter.value              # => GET "limiter"
 limiter.poke                    # => SET limiter 0 NX + INCRBY limiter 1
 limiter.poke                    # => SET limiter 0 NX + INCRBY limiter 1
-limiter.poke                    # => SET limiter 0 NX + INCRBY limiter 1
 false == limiter.exceeded?      # => GET "limiter"
 limiter.poke                    # => SET limiter 0 NX + INCRBY limiter 1
 true == limiter.exceeded?       # => GET "limiter"
 sleep 6
 limiter.poke                    # => SET limiter 0 NX + INCRBY limiter 1
 limiter.poke                    # => SET limiter 0 NX + INCRBY limiter 1
-limiter.poke                    # => SET limiter 0 NX + INCRBY limiter 1
 false == limiter.exceeded?      # => GET "limiter"
 ```