Updating to latest API version of Strimzi.

docs/eventing/samples/kafka/_index.md

@@ -34,7 +34,7 @@ is to install it by using [Strimzi](https://strimzi.io).
    ```
 1. Describe the size of your Apache Kafka installation in `kafka.yaml`, like:
    ```yaml
-   apiVersion: kafka.strimzi.io/v1beta1
+   apiVersion: kafka.strimzi.io/v1beta2
    kind: Kafka
    metadata:
      name: my-cluster

docs/eventing/samples/kafka/kafka.yaml

@@ -1,4 +1,4 @@
-apiVersion: kafka.strimzi.io/v1beta1
+apiVersion: kafka.strimzi.io/v1beta2
 kind: Kafka
 metadata:
   name: my-cluster

docs/eventing/samples/kafka/source/index.md

@@ -29,7 +29,7 @@ The `KafkaSource` reads all the messages, from all partitions, and sends those m
 - Replicas
 
   ```yaml
-  apiVersion: kafka.strimzi.io/v1beta1
+  apiVersion: kafka.strimzi.io/v1beta2
   kind: KafkaTopic
   metadata:
     name: knative-demo-topic

docs/eventing/samples/kafka/source/kafka-topic.yaml

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-apiVersion: kafka.strimzi.io/v1beta1
+apiVersion: kafka.strimzi.io/v1beta2
 kind: KafkaTopic
 metadata:
   name: knative-demo-topic