[doc] Add the resource strategy extension point in the toc.xml

cherry-picked-from 3af32abe1e64432808303340b3a05f4ddcfa8047
Change-Id: I92731572807e603101e20346e72810eb621397f8
Signed-off-by: Laurent Fasani <laurent.fasani@obeo.fr>
diff --git a/plugins/org.eclipse.sirius.doc/doc/toc.xml b/plugins/org.eclipse.sirius.doc/doc/toc.xml
index b32b5f0..26fa5e8 100644
--- a/plugins/org.eclipse.sirius.doc/doc/toc.xml
+++ b/plugins/org.eclipse.sirius.doc/doc/toc.xml
@@ -1,6 +1,6 @@
 <?xml version='1.0' encoding='utf-8' ?>
 <!--
-  Copyright (c) 2007-2013 THALES GLOBAL SERVICES
+  Copyright (c) 2007, 2019 THALES GLOBAL SERVICES
   This program and the accompanying materials
   are made available under the terms of the Eclipse Public License 2.0
   which accompanies this distribution, and is available at
@@ -248,6 +248,8 @@
         <topic href="doc/developer/extensions-properties_provide_custom_widget_basic.html" label="Basic approach" />
         <topic href="doc/developer/extensions-properties_provide_custom_widget_advanced.html" label="Advanced approach" />
       </topic>
+      <topic href="doc/developer/extensions-provide_resource_strategy.html" label="Provide a resource strategy">
+      </topic>
       <anchor id="moreExtensionPointsRefs" />
     </topic>
     <anchor id="moreDeveloperRefs" />