Fix typo

Author: upyx

service_container/service_subscribers_locators.rst

@@ -307,7 +307,7 @@ or directly via PHP attributes:
             <services>
                 <service id="App\CommandBus">
                     <argument type="service_locator">
-                        <argument key="App\FooCommand" type="service" id="sapp.command_handler.foo"/>
+                        <argument key="App\FooCommand" type="service" id="app.command_handler.foo"/>
                         <argument key="App\BarCommand" type="service" id="app.command_handler.bar"/>
                     </argument>
                 </service>