docs: Update external links

Author: NickLarsenNZ

docs/modules/zookeeper/pages/reference/discovery.adoc

@@ -26,7 +26,7 @@ The name of the ConfigMap created for this discovery profile is `$BASENAME-nodep
 
 Each discovery profile contains the following fields:
 
-`ZOOKEEPER`:: A connection string, as accepted by https://zookeeper.apache.org/doc/r3.9.3/apidocs/zookeeper-server/org/apache/zookeeper/ZooKeeper.html#ZooKeeper-java.lang.String-int-org.apache.zookeeper.Watcher-[the official Java client], e.g. `test-zk-server-default-0.test-zk-server-default.kuttl-test-proper-spaniel.svc.cluster.local:2282,test-zk-server-default-1.test-zk-server-default.kuttl-test-proper-spaniel.svc.cluster.local:2282/znode-4e169890-d2eb-4d62-9515-e4786f0ac58e`
+`ZOOKEEPER`:: A connection string, as accepted by https://zookeeper.apache.org/doc/r3.9.4/apidocs/zookeeper-server/org/apache/zookeeper/ZooKeeper.html#ZooKeeper-java.lang.String-int-org.apache.zookeeper.Watcher-[the official Java client], e.g. `test-zk-server-default-0.test-zk-server-default.kuttl-test-proper-spaniel.svc.cluster.local:2282,test-zk-server-default-1.test-zk-server-default.kuttl-test-proper-spaniel.svc.cluster.local:2282/znode-4e169890-d2eb-4d62-9515-e4786f0ac58e`
 `ZOOKEEPER_HOSTS`:: A comma-separated list of `node1:port1,node2:port2,...`, e.g. `test-zk-server-default-0.test-zk-server-default.kuttl-test-proper-spaniel.svc.cluster.local:2282,test-zk-server-default-1.test-zk-server-default.kuttl-test-proper-spaniel.svc.cluster.local:2282`
 `ZOOKEEPER_CHROOT`:: The name of the root ZNode associated with the discovery profile, should be used if (and only if) connecting using `ZOOKEEPER_HOSTS` (rather than `ZOOKEEPER`), e.g. `/znode-4e169890-d2eb-4d62-9515-e4786f0ac58e` in case of a ZNode discovery or `/` in case of a ZookeeperServer discovery
 `ZOOKEEPER_CLIENT_PORT`:: The port clients should use when connecting, e.g. `2282`

docs/modules/zookeeper/pages/usage_guide/overrides.adoc

@@ -39,7 +39,7 @@ servers:
 
 All property values must be strings.
 
-For a full list of configuration options refer to the Apache ZooKeeper https://zookeeper.apache.org/doc/r3.9.3/zookeeperAdmin.html#sc_configuration[Configuration Reference].
+For a full list of configuration options refer to the Apache ZooKeeper https://zookeeper.apache.org/doc/r3.9.4/zookeeperAdmin.html#sc_configuration[Configuration Reference].
 
 === Overriding entries in security.properties
 

docs/modules/zookeeper/pages/znodes.adoc

@@ -1,7 +1,7 @@
 = ZNodes
 :description: Manage ZooKeeper ZNodes with the ZookeeperZnode resource. Each client should use a unique root ZNode to prevent conflicts. Network access to ZooKeeper is required.
 
-Apache ZooKeeper organizes all data into a hierarchical system of https://zookeeper.apache.org/doc/r3.9.3/zookeeperProgrammers.html#ch_zkDataModel[ZNodes],
+Apache ZooKeeper organizes all data into a hierarchical system of https://zookeeper.apache.org/doc/r3.9.4/zookeeperProgrammers.html#ch_zkDataModel[ZNodes],
 which act as both files (they can have data associated with them) and folders (they can contain other ZNodes) when compared to a traditional (POSIX-like) file system.
 
 In order to isolate different clients using the same ZooKeeper cluster, each client application should be assigned a unique root ZNode, which it can then organize