Polish "Add package info for Spring Data metrics support"

See gh-28756

Author: snicoll

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/data/package-info.java

@@ -15,6 +15,6 @@
  */
 
 /**
- * Actuator support for Spring Data {@code Repository} metrics.
+ * Actuator support for Spring Data Repository metrics.
  */
 package org.springframework.boot.actuate.metrics.data;