Modify use case requirement title

from MDONS to MDONs extension

Issue-ID: INT-1776

Signed-off-by: mrichomme <morgan.richomme@orange.com>
Change-Id: If57b7f17d3769615ba666cab15198194c3621ed6
diff --git a/docs/files/csv/usecases.csv b/docs/files/csv/usecases.csv
index 3f4f2ad..da4149d 100644
--- a/docs/files/csv/usecases.csv
+++ b/docs/files/csv/usecases.csv
@@ -2,4 +2,4 @@
 REQ-342;E2E Network Slicing;:ref:`official doc <docs_E2E_network_slicing>`;Swaminathan S
 REQ-345;5G OOF SON;:ref:`official doc <docs_5G_oof_pci>`;Reshmasree c
 REQ-347;CCVPN-Transport Slicing;:ref:`official doc <docs_ccvpn>`;X.Miao,G.Agrawal,Shashikanth VH
-REQ-325;MDONS;:ref:`official doc <docs_CCVPN>`;X.Miao
+REQ-325;MDONS extension;:ref:`official doc <docs_CCVPN>`;X.Miao