Bump org.apache.zookeeper:zookeeper in /test/fixtures/hdfs-fixture

Bumps org.apache.zookeeper:zookeeper from 3.9.0 to 3.9.1.

---
updated-dependencies:
- dependency-name: org.apache.zookeeper:zookeeper
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

test/fixtures/hdfs-fixture/build.gradle

@@ -64,7 +64,7 @@ dependencies {
   api "org.jetbrains.kotlin:kotlin-stdlib:${versions.kotlin}"
   api "org.eclipse.jetty:jetty-server:${versions.jetty}"
   api "org.eclipse.jetty.websocket:javax-websocket-server-impl:${versions.jetty}"
-  api 'org.apache.zookeeper:zookeeper:3.9.0'
+  api 'org.apache.zookeeper:zookeeper:3.9.1'
   api "org.apache.commons:commons-text:1.10.0"
   api "commons-net:commons-net:3.9.0"
   runtimeOnly "com.google.guava:guava:${versions.guava}"