Update readme.adoc

Author: jexp

readme.adoc

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 = Neo4j Streaming Data Integrations
 :docs: https://neo4j-contrib.github.io/neo4j-streams/
 
-image::https://github.com/neo4j-contrib/neo4j-streams/raw/gh-pages/3.5/images/neo4j-loves-confluent.png[]
+image::https://github.com/neo4j-contrib/neo4j-streams/raw/gh-pages/3.4/images/neo4j-loves-confluent.png[]
 
 This project integrates Neo4j with streaming data solutions.