bump up Zookeeper version from 3.4 to be able to use on arm64

[konstan]

Official Zookeeper images https://hub.docker.com/_/zookeeper start supporting arm64 from 3.5

However, ATM I'm not able to run them as part of compose Nuvla deployment on M1 (arm64) because of this NPE

2022-01-27 07:35:44,952 [myid:3] - ERROR [ContainerManagerTask:ContainerManager$1@102] - Error checking containers
java.lang.NullPointerException
        at org.apache.zookeeper.server.ContainerManager.getCandidates(ContainerManager.java:161)
        at org.apache.zookeeper.server.ContainerManager.checkContainers(ContainerManager.java:128)
        at org.apache.zookeeper.server.ContainerManager$1.run(ContainerManager.java:96)
        at java.base/java.util.TimerThread.mainLoop(Unknown Source)
        at java.base/java.util.TimerThread.run(Unknown Source)

As pointed out here https://issues.apache.org/jira/browse/ZOOKEEPER-4238, this might be an issue with the propagation of env vars to the container from compose.

Starting the image from CLI works fine.