Corrects two typos

corrects two small typos in the documentation.

Author: xoronet

src/reference/asciidoc/kafka.adoc

@@ -1979,7 +1979,7 @@ If you change the multicaster to use an async executor, thread cleanup is not ef
 
 Version 2.1.3 added `pause()` and `resume()` methods to listener containers.
 Previously, you could pause a consumer within a `ConsumerAwareMessageListener` and resume it by listening for a `ListenerContainerIdleEvent`, which provides access to the `Consumer` object.
-While you could pause a consumer in an idle container byi using an event listener, in some cases, this was not thread-safe, since there is no guarantee that the event listener is invoked on the consumer thread.
+While you could pause a consumer in an idle container by using an event listener, in some cases, this was not thread-safe, since there is no guarantee that the event listener is invoked on the consumer thread.
 To safely pause and resume consumers, you should use the `pause` and `resume` methods on the listener containers.
 A `pause()` takes effect just before the next `poll()`; a `resume()` takes effect just after the current `poll()` returns.
 When a container is paused, it continues to `poll()` the consumer, avoiding a rebalance if group management is being used, but it does not retrieve any records.