Update README.md

Author: stefanak-michal

README.md

@@ -16,7 +16,7 @@ all available versions and keep up with protocol messages architecture and speci
 
 ## Version support
 
-We are trying to keep up and this library supports **Neo4j <= 5.5** with **Bolt <= 5.1**.
+We are trying to keep up and this library supports **Neo4j <= 5.6** with **Bolt <= 5.1**.
 
 https://www.neo4j.com/docs/bolt/current/bolt-compatibility/