Merge pull request #19835 from dreis2211

* pr/19835:
  Add UTF-8 encoding to spring-boot-starter-parent POM

Closes gh-19835

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

@@ -23,6 +23,8 @@ publishing.publications.withType(MavenPublication) {
 				delegate.'resource.delimiter'('@')
 				delegate.'maven.compiler.source'('${java.version}')
 				delegate.'maven.compiler.target'('${java.version}')
+				delegate.'project.build.sourceEncoding'('UTF-8')
+				delegate.'project.reporting.outputEncoding'('UTF-8')
 			}
 		}
 		root.issueManagement.plus {