Don't fail build on duplicate module-info classes

Update the duplicate-finder-maven-plugin configuration to ignore
module-info classes.

Closes gh-13403

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

 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
@@ -145,6 +146,9 @@
 							<ignoredResourcePatterns>
 								<ignoredResourcePattern>changelog.txt</ignoredResourcePattern>
 							</ignoredResourcePatterns>
+							<ignoredClassPatterns>
+								<ignoredClassPattern>module-info</ignoredClassPattern>
+							</ignoredClassPatterns>
 						</configuration>
 					</execution>
 				</executions>