Update docs

Author: vkrasnovyd

docs/actions/motion_supporter.create.md

@@ -7,7 +7,7 @@
 ```
 
 ## Action
-Creates a motion_submitter.
+Creates a motion_supporter.
 This action fails in two cases:
 - the supporter system is deactivated (`meeting/motions_supporters_min_amount` is 0)
 - the motion state's `state/allow_support` is false and the calling user does not have `motion.can_manage_meta_data` permission.

docs/actions/motion_supporter.delete.md

@@ -6,7 +6,7 @@
 ```
 
 ## Action
-Deletes a motion_submitter.
+Deletes a motion_supporter.
 With the exception of internal calls (for the sake of merge), this action fails in two cases:
 - the supporter system is deactivated (`meeting/motions_supporters_min_amount` is 0)
 - the motion state's `state/allow_support` is false and the calling user does not have `motion.can_manage_meta_data` permission.

openslides_backend/action/actions/__init__.py

@@ -30,6 +30,7 @@ def prepare_actions_map() -> None:
         motion_editor,
         motion_state,
         motion_submitter,
+        motion_supporter,
         motion_workflow,
         motion_working_group_speaker,
         option,