bump zookeeper helm chart version so all the objects the kafka chart produces adhere to the k8s JSON schema strictly (#18261)

Signed-off-by: Cade Markegard <cademarkegard@gmail.com>

incubator/kafka/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 description: Apache Kafka is publish-subscribe messaging rethought as a distributed
   commit log.
 name: kafka
-version: 0.20.1
+version: 0.20.2
 appVersion: 5.0.1
 keywords:
 - kafka

incubator/kafka/requirements.lock

@@ -1,6 +1,6 @@
 dependencies:
 - name: zookeeper
   repository: https://kubernetes-charts-incubator.storage.googleapis.com/
-  version: 2.0.0
-digest: sha256:a564a1ed1f76137e5562d5fb598f45998812fa166e94fc1ba44a2f7774df920d
-generated: 2019-08-13T14:56:29.724627+01:00
+  version: 2.0.2
+digest: sha256:31fcefa3c492b4200bf5bb3b99bac67194a70942a5dce0a6f671a7f1af8455ee
+generated: "2019-10-23T16:32:06.44599-07:00"

incubator/kafka/requirements.yaml

@@ -1,5 +1,5 @@
 dependencies:
 - name: zookeeper
-  version: 2.0.0
+  version: 2.0.2
   repository: https://kubernetes-charts-incubator.storage.googleapis.com/
   condition: kafka.zookeeper.enabled,zookeeper.enabled