Update maven-artifact, maven-core, ... to 3.9.9

Author: scala-center-steward[bot]

pom.xml

@@ -19,7 +19,7 @@
     <nexus.url>https://oss.sonatype.org</nexus.url>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <version.maven.base>3.9.5</version.maven.base>
+    <version.maven.base>3.9.9</version.maven.base>
     <version.maven.plugin.plugin>3.15.1</version.maven.plugin.plugin>
   </properties>