Polish RequestMatcher Description

Issue gh-13794

config/src/main/java/org/springframework/security/config/annotation/web/AbstractRequestMatcherRegistry.java

@@ -594,7 +594,7 @@ public abstract class AbstractRequestMatcherRegistry<C> {
 				this.description.set(matcher.toString());
 				return matcher;
 			});
-			this.description.set("Deferred " + candidates);
+			this.description.set("Deferred " + Arrays.toString(candidates));
 		}
 
 		@Override