[update] properties description typos

Author: Serhii Pylypchuk

docs/api/config/js_kanban_editorautosave_config.md

@@ -18,7 +18,7 @@ editorAutoSave?: boolean // (true by default)
 
 ### Parameters
 
-- `editorAutoSave` - (optioanal) if **true**, the **autosave** mode of Kanban will be enabled 
+- `editorAutoSave` - (optional) if **true**, the **autosave** mode of Kanban is enabled 
 
 :::info
 Using this parameter, you can enable/disable an autosave mode of Kanban. If you set the **editorAutoSave** property to **false**, the editor will display the "Save" button to save edited data

docs/api/config/toolbar_api_config.md

@@ -18,7 +18,7 @@ api: object
 
 ### Parameters
 
-- `api` - an object with the internal API of Kanban. It is used for the toolbar controls functionality
+- `api` - (mandatory) an object with the internal API of Kanban. It is used for the toolbar controls functionality
 
 :::info
 In this case, the **internal API of Kanban** is used for the **search bar** and **controls for adding columns and rows** located on the Toolbar

docs/api/config/toolbar_items_config.md

@@ -22,7 +22,7 @@ items?: [
 
 ### Parameters
 
-- `items` - an array with settings for configuring the toolbar controls. Here you can specify the following parameters:
+- `items` - (optional) an array with settings for configuring the toolbar controls. Here you can specify the following parameters:
 	- `"search"` - (optional) a search bar
 	- `"controls"` - (optional) controls for adding the columns and rows
 	- `custom_control` - (optional) custom control. Here you can specify the custom control(s) both as a **string** or **function**. See the [Customization](../../../guides/customization#custom-toolbar) section