Fix typo in package-info.java

Author: mbhave

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/couchbase/package-info.java

@@ -15,6 +15,6 @@
  */
 
 /**
- * Actuator support for Cassandra.
+ * Actuator support for Couchbase.
  */
 package org.springframework.boot.actuate.couchbase;