[incubator/kafka][bugfix] Mount secret items to proper subpaths (#7423)

Signed-off-by: rustycl0ck <the.absolute.dude@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: 0.9.0
+version: 0.9.1
 appVersion: 4.1.2
 keywords:
 - kafka

incubator/kafka/templates/statefulset.yaml

@@ -201,7 +201,7 @@ spec:
           {{- if $secret.mountPath }}
             {{- range $key := $secret.keys }}
         - name: {{ include "kafka.fullname" $ }}-{{ $secret.name }}
-          mountPath: {{ $secret.mountPath }}
+          mountPath: {{ $secret.mountPath }}/{{ $key }}
           subPath: {{ $key }}
           readOnly: true
             {{- end }}