Update version to 4.28.6

Author: SgtSilvio

README.adoc

@@ -25,15 +25,15 @@ Maven
 <dependency>
     <groupId>com.hivemq</groupId>
     <artifactId>hivemq-amazon-kinesis-extension-customization-sdk</artifactId>
-    <version>4.28.5</version>
+    <version>4.28.6</version>
 </dependency>
 ----
 
 Gradle
 
 [source,groovy]
 ----
-implementation("com.hivemq:hivemq-amazon-kinesis-extension-customization-sdk:4.28.5")
+implementation("com.hivemq:hivemq-amazon-kinesis-extension-customization-sdk:4.28.6")
 ----
 
 NOTE: The HiveMQ Amazon Kinesis Extension Customization SDK is available in Maven central, so no special configuration is needed.

gradle.properties

@@ -1 +1 @@
-version=4.28.6-SNAPSHOT
+version=4.28.6