Configure resources filtering encoding

Closes gh-24576

spring-boot-project/spring-boot-starters/spring-boot-starter-parent/build.gradle

@@ -125,6 +125,7 @@ publishing.publications.withType(MavenPublication) {
 							delegate.groupId('org.apache.maven.plugins')
 							delegate.artifactId('maven-resources-plugin')
 							configuration {
+								delegate.propertiesEncoding('${project.build.sourceEncoding}')
 								delimiters {
 									delegate.delimiter('${resource.delimiter}')
 								}