Mentioned pages to CE port in project/pages/index.md

doc/user/project/pages/index.md

@@ -3,6 +3,7 @@
 > **Notes:**
 > - This feature was [introduced][ee-80] in GitLab EE 8.3.
 > - Custom CNAMEs with TLS support were [introduced][ee-173] in GitLab EE 8.5.
+> - GitLab Pages [were ported][ce-14605] to Community Edition in GitLab 8.17.
 > - This document is about the user guide. To learn how to enable GitLab Pages
 >   across your GitLab instance, visit the [administrator documentation](../../../administration/pages/index.md).