Bump org.apache.zookeeper:zookeeper from 3.9.3 to 3.9.4

Bumps org.apache.zookeeper:zookeeper from 3.9.3 to 3.9.4.

---
updated-dependencies:
- dependency-name: org.apache.zookeeper:zookeeper
  dependency-version: 3.9.4
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -1080,7 +1080,7 @@
   		<dependency>
   			<groupId>org.apache.zookeeper</groupId>
   			<artifactId>zookeeper</artifactId>
-  			<version>3.9.3</version>
+  			<version>3.9.4</version>
   		</dependency>
   		<dependency>
 	      <groupId>ch.qos.logback</groupId>