Pull in Note using :end-before: include directive

source/community/release_notes/redwood/sidebar_nav.rst

@@ -16,6 +16,8 @@ sidebar navigation to let us know if they discover any additional bugs while
 using it. With the community's help, we can aim to make this the best navigation
 experience it can be. 
 
+.. sidebar_nav_issues_marker
+
 .. note::
 
     Known issues with sidebar navigation include:

source/community/release_notes/sumac/default_sidebar_nav.rst

@@ -12,19 +12,6 @@ for more detail.
 .. include:: ../redwood/sidebar_nav.rst
     :start-after: sidebar_nav_content_marker
 
-.. note::
-
-    Known issues with sidebar navigation include:
-
-    * When a member of the course delivery team updates the name of a course
-      unit, the unit name updates at the top of the unit page, but does not
-      update in the sidebar navigation.
-    * When using content groups in a course, the sidebar navigation does not
-      hide hidden units when a staff user views the course as a content group
-      using the masquerading feature. Content groups work as expected for real
-      learners in content groups. Staff can masquerade as an individual user in
-      a specific content group to view how a member of the content group
-      actually sees the course and the sidebar.
-    * Course sections, subsections, and unit names may appear as missing from
-      the sidebar navigation in sections that include content that has yet to be
-      published.
+.. include:: ../redwood/sidebar_nav.rst
+    :start-after: sidebar_nav_issues_marker
+    :end-before: sidebar_nav_content_marker