Corrected hook definition.

docs/hooks/hook_civicrm_container.md

@@ -16,7 +16,7 @@ This hook is available in CiviCRM 4.7+.
 
 ## Definition
 
-    container(\Symfony\Component\DependencyInjection\ContainerBuilder $container)
+    hook_civicrm_container(\Symfony\Component\DependencyInjection\ContainerBuilder $container)
 
 ## Parameters
 
@@ -36,4 +36,4 @@ This hook is available in CiviCRM 4.7+.
     function mymodule_civicrm_container($container) {
       $container->addResource(new FileResource(__FILE__));
       $container->setDefinition('mysvc', new Definition('My\Class', array()));
-    }
\ No newline at end of file
+    }