fix(example): correct records-number param in txn producer readme (#2420

)

examples/txn_producer/README.md

@@ -3,8 +3,8 @@
 This example shows you how to use the Sarama transactional producer. The example simply starts some goroutine that produce endlesslly on associated topic.
 
 ```bash
-$ go run main.go -brokers="127.0.0.1:9092" -topic="sarama" -producers=10 -record-numbers=10000
+$ go run main.go -brokers="127.0.0.1:9092" -topic "sarama" -producers 10 -records-number 10000
 ```
 
 To ensure transactional-id uniqueness it implement some ***ProducerProvider*** that build a producer appending an integer that grow when producer is created.
-You can also see record-rate each 5s printing on stdout.
+You can also see record-rate each 5s printing on stdout.