Bump org.apache.zookeeper:zookeeper

Bumps org.apache.zookeeper:zookeeper from 3.6.4 to 3.7.2.

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/flink-shaded-zookeeper-parent/flink-shaded-zookeeper-36/pom.xml b/flink-shaded-zookeeper-parent/flink-shaded-zookeeper-36/pom.xml
index 1e073d9..d72e27c 100644
--- a/flink-shaded-zookeeper-parent/flink-shaded-zookeeper-36/pom.xml
+++ b/flink-shaded-zookeeper-parent/flink-shaded-zookeeper-36/pom.xml
@@ -33,7 +33,7 @@
     <version>${zookeeper.version}-19.0</version>
 
     <properties>
-        <zookeeper.version>3.6.4</zookeeper.version>
+        <zookeeper.version>3.7.2</zookeeper.version>
         <curator.version>5.4.0</curator.version>
     </properties>