chore: update demo

wasm/index.html

@@ -248,6 +248,9 @@ This is a quote
 This is an example block
 #+end_example
 
+-----
+List
+
 1. First item
 2. Second item
 3. Third item
@@ -255,13 +258,22 @@ This is an example block
     * Indented item
 4. Fourth item
 
-Table:
+-----
+Description list
+
+- Rust _programming_ language:: A language empowering everyone
+  to build reliable and efficient software.
+
+-----
+Table
+
 |Syntax     |Description|
 |-----------|-----------|
 |Header     |Title      |
 |Paragraph  |Text       |
 
-Image:
+-----
+Image
 
 [[https://www.rust-lang.org/static/images/rust-logo-blk.svg]]
 `);