docs(list-item): add list as a type of element allowed in default slo…

…t. (#9934)

**Related Issue:** None

## Summary

- update doc

packages/calcite-components/src/components/list-item/list-item.tsx

@@ -55,7 +55,7 @@ const focusMap = new Map<HTMLCalciteListElement, number>();
 const listSelector = "calcite-list";
 
 /**
- * @slot - A slot for adding `calcite-list-item` and `calcite-list-item-group` elements.
+ * @slot - A slot for adding `calcite-list`, `calcite-list-item` and `calcite-list-item-group` elements.
  * @slot actions-start - A slot for adding actionable `calcite-action` elements before the content of the component.
  * @slot content-start - A slot for adding non-actionable elements before the label and description of the component.
  * @slot content - A slot for adding non-actionable, centered content in place of the `label` and `description` of the component.