Upgrade to Flatten Maven Plugin 1.0.1

Closes gh-13650

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -208,7 +208,7 @@
 		<maven-war-plugin.version>3.1.0</maven-war-plugin.version>
 		<versions-maven-plugin.version>2.3</versions-maven-plugin.version>
 		<xml-maven-plugin.version>1.0.2</xml-maven-plugin.version>
-		<flatten-maven-plugin.version>1.0.0</flatten-maven-plugin.version>
+		<flatten-maven-plugin.version>1.0.1</flatten-maven-plugin.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>