HBX-3125: Update the version of Gradle to 9.0.0

  - The gradle version stays on 8.x because 9.x requires Java 17

Signed-off-by: Koen Aers <[email protected]>

Author: koentsje

pom.xml

@@ -98,6 +98,7 @@
     <properties>
 
         <maven.version>3.9.11</maven.version>
+        <!-- gradle versions starting from 9.0 require java 17 -->
         <gradle.version>8.14.3</gradle.version>
 
         <ant.version>1.10.15</ant.version>