Fix type in metadataKeysToSanitize

closes codecentric#1366

Author: joshiste

spring-boot-admin-docs/src/main/asciidoc/server.adoc

@@ -48,7 +48,7 @@ In addition when the reverse proxy terminates the https connection, it may be ne
 
 | spring.boot.admin.metadata-keys-to-sanitize
 | Metadata values for the keys matching these regex patterns will be sanitized in all json output.
-| `".*password$", ".*secret$", ".*key$", ".*$token$", ".*credentials.*", ".*vcap_services$"`
+| `".*password$", ".*secret$", ".*key$", ".*token$", ".*credentials.*", ".*vcap_services$"`
 
 | spring.boot.admin.probed-endpoints
 | For Spring Boot 1.x client applications SBA probes for the specified endpoints using an OPTIONS request.

spring-boot-admin-server/src/main/java/de/codecentric/boot/admin/server/config/AdminServerProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2019 the original author or authors.
+ * Copyright 2014-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ public class AdminServerProperties {
 /**
  * The metadata keys which should be sanitized when serializing to json
  */
-private String[] metadataKeysToSanitize = new String[] { ".*password$", ".*secret$", ".*key$", ".*$token$",
+private String[] metadataKeysToSanitize = new String[] { ".*password$", ".*secret$", ".*key$", ".*token$",
 ".*credentials.*", ".*vcap_services$" };
 
 /**