Update UPGRADE.md

Co-authored-by: Alexander Makarov <[email protected]>

UPGRADE.md

@@ -23,7 +23,6 @@ application when you upgrade the package from one version to another.
 ],
 ```
 
-- Changed behavior of controller name extractor. Now it uses greedy search of namespace items with "controller(s)" 
-  postfix. For example, controller namespace is `App\AllControllers\MyController\FooBar\BazController`. Previously,
+- Controller name extractor now uses greedy search of namespace items with "controller(s)" postfix. For example, for controller namespace `App\AllControllers\MyController\FooBar\BazController` previously,
   result was "controller/foo-bar/baz", now it is "foo-bar/baz". You can use `ViewRenderer::withControllerName()`
   instead of `ViewRenderer::withController()` to explicitly define controller name.