[MRESOLVER-577] Update to Maven 3.9.8

Maven used by supplier and demos.

---

https://issues.apache.org/jira/browse/MRESOLVER-577

Author: cstamas

pom.xml

@@ -93,7 +93,7 @@
     <guiceVersion>6.0.0</guiceVersion>
     <slf4jVersion>1.7.36</slf4jVersion>
     <!-- used by supplier and demo only -->
-    <mavenVersion>3.9.6</mavenVersion>
+    <mavenVersion>3.9.8</mavenVersion>
     <minimalMavenBuildVersion>[3.8.7,)</minimalMavenBuildVersion>
     <minimalJavaBuildVersion>[1.8.0-362,)</minimalJavaBuildVersion>
     <project.build.outputTimestamp>2024-04-26T10:43:34Z</project.build.outputTimestamp>