Merge branch '3.5.x'

Author: philwebb

module/spring-boot-opentelemetry/src/main/java/org/springframework/boot/opentelemetry/autoconfigure/OpenTelemetryResourceAttributes.java

@@ -45,7 +45,8 @@
 public class OpenTelemetryResourceAttributes {
 
 /**
- * Default value for service name if {@code service.name} is not set.
+ * Default value for service name. Used if {@code service.name} is not set and no name
+ * can be deduced from the running application.
  */
 private static final String DEFAULT_SERVICE_NAME = "unknown_service";