Documentation: Consistently say 'lexicographically' instead of 'alphabetically'

Change-Id: I958e9893eb48282af6968b07af0cb2b84e3920c9

Documentation/rest-api-config.txt

diff --git a/Documentation/rest-api-config.txt b/Documentation/rest-api-config.txt
index 7246786..82d9f3e 100644
--- a/Documentation/rest-api-config.txt
+++ b/Documentation/rest-api-config.txt
@@ -407,7 +407,7 @@
 +
 Returns the cache names as JSON list.
 +
-The cache names are alphabetically sorted.
+The cache names are lexicographically sorted.
 +
 .Request
 ----