docs(types): fix markdown block type annotation (#2298)

Author: zimeg

packages/types/src/block-kit/blocks.ts

@@ -250,11 +250,11 @@ export interface InputBlock extends Block {
  * @description This block can be used with AI apps when you expect a markdown response from an LLM that can get lost in
  * translation rendering in Slack. Providing it in a markdown block leaves the translating to Slack to ensure your message
  * appears as intended. Note that passing a single block may result in multiple blocks after translation.
- * @see {@link https://api.slack.com/reference/block-kit/blocks#markdown Markdown block reference}
+ * @see {@link https://api.slack.com/reference/block-kit/blocks#markdown Markdown block reference}.
  */
 export interface MarkdownBlock extends Block {
   /**
-   * @description The type of block. For a markdown block, `type` is always `input`.
+   * @description The type of block. For a markdown block, `type` is always `markdown`.
    */
   type: 'markdown';
   /**