Merge pull request #2341 from spring-cloud/dependabot/maven/main/org.codehaus.mojo-flatten-maven-plugin-1.7.3

Author: ryanjbaxter

pom.xml

@@ -64,7 +64,7 @@
 		<xerces.version>2.12.2</xerces.version>
 		<jacoco-maven-plugin.version>0.8.13</jacoco-maven-plugin.version>
 		<exec-maven-plugin.version>3.6.2</exec-maven-plugin.version>
-		<flatten-maven-plugin.version>1.5.0</flatten-maven-plugin.version>
+		<flatten-maven-plugin.version>1.7.3</flatten-maven-plugin.version>
 		<commons-beanutils.version>1.9.4</commons-beanutils.version>
 		<sisu-inject-plexus.version>2.6.0</sisu-inject-plexus.version>