SDCORE-669 Added UDM documentation

Change-Id: I874a663bec3e3c2c3cf28fa37e5a76ecd97a6dc5
diff --git a/dict.txt b/dict.txt
index dae4039..4ae7726 100644
--- a/dict.txt
+++ b/dict.txt
@@ -76,3 +76,4 @@
 Minikube
 Deregister
 ransim
+Ue