Fix handling non-existent large context group.

Large context group is optional. For instance, it is not required at the
DNB instance.

Change-Id: I7922349cdb8a53fcb95d1e3f01d2b6b9a3c62165
diff --git a/Changes b/Changes
index f32bce1..fdbc55a 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,7 @@
 
 - Add a large-context group allowing users to access larger context by request [AI-assisted, #745]
 - Apply new kwic and shrinking properties for kustvakt-dnb
+- Fix handling non-existent large context group
 
 # version 1.2-SNAPSHOT