Document major PolyGerrit enhancement in 2.16 release

The major PolyGerrit UI enhancement is not documented in the release
notes: Display repository access information and allow to edit it.

Change-Id: Ia98217b635b1e17c497455059f8d5ba2134ef1cf
diff --git a/pages/site/releases/2.16.md b/pages/site/releases/2.16.md
index 5831cab..dc66386 100644
--- a/pages/site/releases/2.16.md
+++ b/pages/site/releases/2.16.md
@@ -204,6 +204,13 @@
 
 ### PolyGerrit enhancements
 
+#### Repo access view
+
+- [Issue 6569](https://bugs.chromium.org/p/gerrit/issues/detail?id=6569)
+  Add repo access view.
+
+PolyGerrit UI displays the repository access information and allows editing it.
+
 #### Inline edit
 - [Issue 4437](https://bugs.chromium.org/p/gerrit/issues/detail?id=4437)
   inline edit is fully implemented using the CodeMirror Editor plugin.