Bump maven to 3.9.9 (#1065)

Also change license plugin config to use non-deprecated params

Author: philsttr

.mvn/wrapper/maven-wrapper.properties

@@ -14,5 +14,5 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.5/apache-maven-3.8.5-bin.zip
-wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.9/apache-maven-3.9.9-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.3.2/maven-wrapper-3.3.2.jar

pom.xml

@@ -593,17 +593,21 @@
                     <artifactId>license-maven-plugin</artifactId>
                     <version>${license-maven-plugin.version}</version>
                     <configuration>
-                        <header>license-header.txt</header>
-                        <mapping>
-                            <java>SLASHSTAR_STYLE</java>
-                        </mapping>
-                        <includes>
-                            <include>src/main/java/**</include>
-                            <include>src/test/java/**</include>
-                        </includes>
                         <defaultProperties>
                             <year>2025</year>
                         </defaultProperties>
+                        <licenseSets>
+                            <licenseSet>
+                                <header>license-header.txt</header>
+                                <includes>
+                                    <include>src/main/java/**</include>
+                                    <include>src/test/java/**</include>
+                                </includes>
+                            </licenseSet>
+                        </licenseSets>
+                        <mapping>
+                            <java>SLASHSTAR_STYLE</java>
+                        </mapping>
                     </configuration>
                 </plugin>