docs: Update label management tool references in documentation

Updated README.md and homeassistant-addon/DOCS.md to reference
ha_manage_entity_labels instead of deprecated ha_assign_label.

Changes:
- README.md: Updated tool list in Labels section
- homeassistant-addon/DOCS.md: Updated tool list in Labels section

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: julienld

README.md

@@ -121,7 +121,7 @@ Spend less time configuring, more time enjoying your smart home.
 | **Helper Entities** | `ha_config_list_helpers`, `ha_config_set_helper`, `ha_config_remove_helper` |
 | **Dashboards** | `ha_config_list_dashboards`, `ha_config_get_dashboard`, `ha_config_set_dashboard`, `ha_config_update_dashboard_metadata`, `ha_config_delete_dashboard`, `ha_get_dashboard_guide`, `ha_get_card_types`, `ha_get_card_documentation` |
 | **Areas & Floors** | `ha_config_list_areas`, `ha_config_set_area`, `ha_config_remove_area`, `ha_config_list_floors`, `ha_config_set_floor`, `ha_config_remove_floor` |
-| **Labels** | `ha_config_list_labels`, `ha_config_get_label`, `ha_config_set_label`, `ha_config_remove_label`, `ha_assign_label` |
+| **Labels** | `ha_config_list_labels`, `ha_config_get_label`, `ha_config_set_label`, `ha_config_remove_label`, `ha_manage_entity_labels` |
 | **Zones** | `ha_list_zones`, `ha_create_zone`, `ha_update_zone`, `ha_delete_zone` |
 | **Groups** | `ha_config_list_groups`, `ha_config_set_group`, `ha_config_remove_group` |
 | **Todo Lists** | `ha_list_todo_lists`, `ha_get_todo_items`, `ha_add_todo_item`, `ha_update_todo_item`, `ha_remove_todo_item` |

homeassistant-addon/DOCS.md

@@ -279,7 +279,7 @@ The add-on provides 80+ MCP tools for controlling Home Assistant:
 - **Groups**: `ha_config_list_groups`, `ha_config_set_group`, `ha_config_remove_group`
 - **Dashboards**: `ha_config_list_dashboards`, `ha_config_get_dashboard`, `ha_config_set_dashboard`, `ha_config_delete_dashboard`
 - **Areas & Floors**: `ha_config_list_areas`, `ha_config_set_area`, `ha_config_remove_area`, `ha_config_list_floors`, `ha_config_set_floor`, `ha_config_remove_floor`
-- **Labels**: `ha_config_list_labels`, `ha_config_set_label`, `ha_config_remove_label`, `ha_assign_label`
+- **Labels**: `ha_config_list_labels`, `ha_config_set_label`, `ha_config_remove_label`, `ha_manage_entity_labels`
 - **Zones**: `ha_list_zones`, `ha_create_zone`, `ha_update_zone`, `ha_delete_zone`
 
 ### Todo & Calendar