Update dependency io.getunleash:unleash-client-java to v8.3.0

Author: renovate[bot]

pom.xml

@@ -42,7 +42,7 @@
     <spring-doc.version>1.7.0</spring-doc.version>
 
     <!-- dependency versions -->
-    <unleash.version>8.2.1</unleash.version>
+    <unleash.version>8.3.0</unleash.version>
 
     <!-- plugin versions-->
     <jacoco-maven-plugin.version>0.8.10</jacoco-maven-plugin.version>