[pom] Set maven to 3.9.0 (all are provided so it can be this high now)

Author: hazendaz

pom.xml

@@ -47,8 +47,8 @@
 
         <java.target>11</java.target>
 
-        <maven-plugin-api.version>3.1.0-alpha-1</maven-plugin-api.version>
-        <maven-plugin-plugin.version>3.6.0</maven-plugin-plugin.version>
+        <maven-plugin-api.version>3.9.0</maven-plugin-api.version>
+        <maven-plugin-plugin.version>3.9.0</maven-plugin-plugin.version>
 
         <junit.version>4.13.2</junit.version>
         <mockito.version>5.1.1</mockito.version>