[incubator/kafka] update chart repo dependency references (#23977)

Signed-off-by: Scott Rigby <scott@r6by.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: 0.21.2
+version: 0.21.3
 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/
+  repository: https://charts.helm.sh/incubator
   version: 2.1.0
-digest: sha256:f50b0b5f50f4938a5369c5ea479030a4f87e99aecb7752ab434f75a6c39f304a
-generated: "2019-11-05T16:37:25.868424523-06:00"
+digest: sha256:12f8b256da1b973235586eeacf9d9d0a19d364bf106a054b5700c384e9871e40
+generated: "2020-10-30T00:42:54.380194-04:00"

incubator/kafka/requirements.yaml

@@ -1,5 +1,5 @@
 dependencies:
 - name: zookeeper
   version: 2.1.0
-  repository: https://kubernetes-charts-incubator.storage.googleapis.com/
+  repository: https://charts.helm.sh/incubator
   condition: kafka.zookeeper.enabled,zookeeper.enabled