Document where to assign the Check Code Owner global capability

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Ic33026c33a05d71ca28f6691f3c8703973e199d4
diff --git a/resources/Documentation/rest-api.md b/resources/Documentation/rest-api.md
index a4d06db..00a2ac1 100644
--- a/resources/Documentation/rest-api.md
+++ b/resources/Documentation/rest-api.md
@@ -1019,6 +1019,10 @@
 
 Administrators have this capability implicitly assigned.
 
+The same as all global capabilities, the `Check Code Owner` global capability is
+assigned on the `All-Project` project in the `Global Capabilities` access
+section.
+
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 Part of [Gerrit Code Review](../../../Documentation/index.html)