Updated migration guide

Author: michalbundyra

docs/book/migration-v4.md

@@ -6,11 +6,15 @@ Migration guide for Zend Service version 4.0.0.
 
 [`container-interop/container-interop`](https://github.com/container-interop/container-interop)
 was officially deprecated in favor of [PSR-11](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-11-container.md)
-on February 13, 2017. As such, all uses of the `Interop\Container\*` interfaces
-have been replaced with `Psr\Container\ContainerInterface`. Further, installs of
-`container-interop/container-interop` below version `1.2.0` is prohibited via
-Composer's `conflicts` configuration. Version `1.2.0` _does_ extend the PSR-11
-interfaces, and is thus still usable.
+on February 13, 2017. As such, all uses of the interop-container interfaces
+have been replaced with PSR-11 containers interfaces as follows:
+  - `Interop\Container\ContainerInterface` to `Psr\Container\ContainerInterface`,
+  - `Interop\Container\Exception\ContainerException` to `Psr\Container\ContainerExceptionInterface`,
+  - `Interop\Container\Exception\NotFoundException` to `Psr\Container\NotFoundExceptionInterface`.
+
+Further, installs of `container-interop/container-interop` below version `1.2.0`
+is prohibited via Composer's `conflicts` configuration. Version `1.2.0` _does_
+extend the PSR-11 interfaces, and is thus still usable.
 
 If your project typehints any `Interop\ContainerInterop\*` interfaces where any
 `Zend\ServiceManager\*` classes are expected, you _**must**_ update your code to
@@ -21,11 +25,14 @@ PSR-11 interfaces.
 
 To do this, use your favorite find-and-replace tool to update the following:
   - `use Interop\Container\ContainerInterface;` -> `use Psr\Container\ContainerInterface;`
-  - `use Interop\Container\ContainerException;` -> `use Psr\Container\ContainerExceptionInterface;`
+  - `use Interop\Container\Exception\ContainerException;` -> `use Psr\Container\ContainerExceptionInterface;`
+  - `use Interop\Container\Exception\NotFoundException;` -> `use Psr\Container\NotFoundExceptionInterface;`
     - **Note:** You will also need to replace `ContainerException` with `ContainerExceptionInterface`
-      where it is used throughout your code. If you _don't_ want to do that, you can include
-      ` as ContainerException` in the find-and-replace, and any existing use of `ContainerException`
-      will continue to work.
+      and `NotFoundException` with `NotFoundExceptionInterface` where it is used
+      throughout your code. If you _don't_ want to do that, you can include
+      `as ContainerException`/`as NotFoundException` in the find-and-replace,
+      and any existing use of `ContainerException`/`NotFoundException` will
+      continue to work.
 
 > ### Note
 >