Update dependency net.javacrumbs.json-unit:json-unit-assertj to v6

Author: renovate[bot]

pom.xml

@@ -144,7 +144,7 @@
     <dependency>
       <groupId>net.javacrumbs.json-unit</groupId>
       <artifactId>json-unit-assertj</artifactId>
-      <version>5.1.2</version>
+      <version>6.0.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>