[hotfix][legal] Fix zookeeper patch version
diff --git a/flink-shaded-zookeeper-parent/flink-shaded-zookeeper-35/src/main/resources/META-INF/NOTICE b/flink-shaded-zookeeper-parent/flink-shaded-zookeeper-35/src/main/resources/META-INF/NOTICE
index 9f92619..634cf7c 100644
--- a/flink-shaded-zookeeper-parent/flink-shaded-zookeeper-35/src/main/resources/META-INF/NOTICE
+++ b/flink-shaded-zookeeper-parent/flink-shaded-zookeeper-35/src/main/resources/META-INF/NOTICE
@@ -10,5 +10,5 @@
 - org.apache.curator:curator-client:4.2.0
 - org.apache.curator:curator-framework:4.2.0
 - org.apache.curator:curator-recipes:4.2.0
-- org.apache.zookeeper:zookeeper:3.5.5
-- org.apache.zookeeper:zookeeper-jute:3.5.5
+- org.apache.zookeeper:zookeeper:3.5.6
+- org.apache.zookeeper:zookeeper-jute:3.5.6