Test Boot's Maven Plugin against Maven 3.9.0

Closes gh-34469

Author: wilkinsona

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/build.gradle

@@ -133,7 +133,7 @@ task xsdResources(type: Sync) {
 }
 
 prepareMavenBinaries {
-	versions "3.8.5", "3.6.3", "3.5.4"
+	versions "3.9.0", "3.8.5", "3.6.3", "3.5.4"
 }
 
 artifacts {