Fix broken docs link

Issue-ID: DOC-702
Signed-off-by: Malinconico Aniello Paolo <aniellopaolo.malinconico@guest.telecomitalia.it>
Change-Id: Ie8e48fa8ca25d47a3e856a32d0ed8828ab2695b3
(cherry picked from commit 8c60a5754c623884225fc477f8a9834f87706565)
diff --git a/docs/docs_E2E_network_slicing.rst b/docs/docs_E2E_network_slicing.rst
index 648dfd2..fc9d090 100644
--- a/docs/docs_E2E_network_slicing.rst
+++ b/docs/docs_E2E_network_slicing.rst
@@ -308,4 +308,4 @@
 
 The template design, UI configuration, as well as manual configurations for some
 of the components are all described in the following
-`wiki page and its sub-pages <https://wiki.onap.org/display/DW/Operation+Guidance+for+5G+Network+Slicing+Use+Case>`_
+`wiki page and its sub-pages <https://wiki.onap.org/display/DW/User+Operation+Guidance+in+R7+Guilin>`_