[release-notes] index.page: add missing </item> tag

[Link Dupont <link src gnome org>]

commit 60f5465f562cd18cf7b03b1c22ec1c18fa12c791
Author: Link Dupont <link sub-pop net>
Date:   Thu Sep 3 22:06:43 2020 -0400

    index.page: add missing </item> tag

 help/C/index.page | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/C/index.page b/help/C/index.page
index 99028835..e4125039 100644
--- a/help/C/index.page
+++ b/help/C/index.page
@@ -143,7 +143,7 @@
       to Instagram’s Clarendon filter.</p>/</item>
       <item><p>The system menu has a new Restart option, which also can be used
       to go to the Boot menu by holding down the <key>Alt</key> key.</p></item>
-      <item><p>XXX tracker features for users</p>
+      <item><p>XXX tracker features for users</p></item>
     </list>
   </section>