Update 3.0.0 release notes

Change-Id: I3ad69429be30c9b0ce027c24f494550cc52ed648
diff --git a/pages/site/releases/3.0.md b/pages/site/releases/3.0.md
index b728f8c..e38237e 100644
--- a/pages/site/releases/3.0.md
+++ b/pages/site/releases/3.0.md
@@ -22,6 +22,8 @@
   PostgreSQL and MariaDb are also supported. It is also possible for plugins to
   provide another backend by implementing the `AccountPatchReviewStore` interface.
 
+* New quota enforcer extension point.
+
 * [Issue 4040](https://bugs.chromium.org/p/gerrit/issues/detail?id=4040):
 Support for signed push with GPG subkeys.
 
@@ -47,6 +49,13 @@
 
 ## New Features
 
+* New quota enforcer extension point.
+
+  Plugins may implement the
+  [QuotaEnforcer](http://gerrit-documentation.storage.googleapis.com/Documentation/3.0.0/dev-plugins.html#quota-enforcer)
+  interface to enforce
+  [quotas](http://gerrit-documentation.storage.googleapis.com/Documentation/3.0.0/dev-plugins.html#quota-enforcer).
+
 * New core plugins.
 
   The `delete-project`, `gitiles` and `webhooks` plugins are now core plugins
@@ -76,6 +85,6 @@
 
 * Upgrade prolog-cafe to 1.4.4
 
-* Upgrade truth to 0.43
+* Upgrade soy to 2019-03-11
 
-## Plugin API changes
+* Upgrade truth to 0.43
diff --git a/pages/site/releases/README.md b/pages/site/releases/README.md
index c695882..5dfb40d 100644
--- a/pages/site/releases/README.md
+++ b/pages/site/releases/README.md
@@ -25,6 +25,8 @@
 * The database backend for changes, accounts, groups and projects ("ReviewDb") is
 removed and all metadata is now stored in git ("NoteDb").
 
+* New quota enforcer extension point.
+
 * Support for signed push with GPG subkeys.
 
 * New core plugins: `delete-project`, `gitiles` and `webhooks`.