docs: inline code syntax highlighting (closes #1162)

Author: jackyzha0

docs/features/syntax highlighting.md

@@ -95,6 +95,16 @@ const [age, setAge] = useState(50)
 const [name, setName] = useState("Taylor")
 ```
 
+### Inline Highlighting
+
+Append {:lang} to the end of inline code to highlight it like a regular code block.
+
+```
+This is an array `[1, 2, 3]{:js}` of numbers 1 through 3.
+```
+
+This is an array `[1, 2, 3]{:js}` of numbers 1 through 3.
+
 ### Line numbers
 
 Syntax highlighting has line numbers configured automatically. If you want to start line numbers at a specific number, use `showLineNumbers{number}`: