Update index.rst

Switching the `%kernel.project_dir%` case to the first example as without this the default only works if you run the migrations from the project root, else the paths are wrong and you get an error.

Author: dant89

Resources/doc/index.rst

@@ -45,10 +45,9 @@ application:
     doctrine_migrations:
         # List of namespace/path pairs to search for migrations, at least one required
         migrations_paths:
-            'App\Migrations': 'src/App'
+            'App\Migrations': '%kernel.project_dir%/src/App'
             'AnotherApp\Migrations': '/path/to/other/migrations'
             'SomeBundle\Migrations': '@SomeBundle/Migrations'
-            'OtherApp\Migrations': '%kernel.project_dir%/src/OtherApp/Migrations'
 
         # List of additional migration classes to be loaded, optional
         migrations: