Alter vcNamePattern to allow system VC names with less than 3 characters

Change-Id: I56d812242c2f68a2d7fce7b810f3b36e8f9231c3
diff --git a/Changes b/Changes
index 359eec3..290b3eb 100644
--- a/Changes
+++ b/Changes
@@ -5,7 +5,9 @@
     - [feature] Added --progress option to Krill-Indexer (kupietz)
     - [bugfix] Fixed vc cache tests (kupietz)
     - [security] Dependencies updated (diewald, margaretha, kupietz)
-    - [enhancement] Keep corpus or collection node name from json 
+    - [enhancement] Keep corpus or collection node name from json (margaretha) 
+    - [enhancement] Alter vcNamePattern to allow system VC names with less 
+      than 3 characters (margaretha)
 
 0.64.3 2025-08-19
     - [feature] Add tar and zip archive input support to Krill-Indexer (kupietz)