Update 2.16.19 release notes

Change-Id: I43fba8cf2c54c65f6d9690b9bc8251387784ed9f
diff --git a/pages/site/releases/2.16.md b/pages/site/releases/2.16.md
index 59516cb..3c31b66 100644
--- a/pages/site/releases/2.16.md
+++ b/pages/site/releases/2.16.md
@@ -637,7 +637,7 @@
     [`notedb.onlineMigrationThreads`](http://gerrit-documentation.storage.googleapis.com/Documentation/2.16.19/config-gerrit.html#notedb.onlineMigrationThreads)
     allows tuning the number of threads the migration can use.
 
-    This helps to speedup online migration at the expense of imposing a
+    This helps to speed up online migration at the expense of imposing a
     higher load on the Gerrit server running at the same time.
 
   * Add a new metric for monitoring Java deadlocks.
@@ -761,7 +761,7 @@
   Fix incorrect highlighting after `/` character in Javascript.
 
   * [Issue 12775](https://bugs.chromium.org/p/gerrit/issues/detail?id=12775):
-  Fox parent of previous patch sets not being available.
+  Fix parent of previous patch sets not being available.
 
 * Replication Plugin Fixes
 
@@ -787,6 +787,9 @@
   * [Issue 11745](https://bugs.chromium.org/p/gerrit/issues/detail?id=11745):
   Fix firing pending "..all.." events on startup.
 
+  * [Issue 11760](https://bugs.chromium.org/p/gerrit/issues/detail?id=11760)"
+  Make persistent task keys stable.
+
   * Fix URL matching to match real URLs in addition to templated URLs.
 
   * Log when skipping deletion of a ref when pushing to a remote in mirror mode.