udpated UPDATE file

UPDATE.md

@@ -6,6 +6,23 @@ one. It only discusses changes that need to be done when using the "public"
 API of the framework. If you "hack" the core, you should probably follow the
 timeline closely anyway.
 
+PR8 to PR10
+-----------
+
+* Namespace for validators has changed from `validation` to `assert` (it was
+  announced for PR9 but it was not the case then):
+
+    Before:
+
+        @validation:NotNull
+
+    After:
+
+        @assert:NotNull
+
+    Moreover, the `Assert` prefix used for some constraints has been removed
+    (`AssertTrue` to `True`).
+
 PR8 to PR9
 ----------
 
@@ -51,19 +68,6 @@ PR8 to PR9
         app/Resources/views/base.html.twig
         app/Resources/AcmeDemo/views/base.html.twig
 
-* Namespace for validators has changed from `validation` to `assert`:
-
-    Before:
-
-        @validation:NotNull
-
-    After:
-
-        @assert:NotNull
-
-    Moreover, the `Assert` prefix used for some constraints has been removed
-    (`AssertTrue` to `True`).
-
 * Bundle logical names lose their `Bundle` suffix:
 
     *Controllers*: `BlogBundle:Post:show` -> `Blog:Post:show`