Update async-code.mdx (#3837)

docs/developer-docs/smart-contracts/advanced-features/async-code.mdx

@@ -4,12 +4,10 @@ keywords: [advanced, concept, async code, inter-canister calls, async inter-cani
 
 import { MarkdownChipRow } from "/src/components/Chip/MarkdownChipRow";
 
-# Composite queries
+# Async code and inter-canister calls
 
 <MarkdownChipRow labels={["Advanced", "Concept"]} />
 
-# Async code and inter-canister calls
-
 ## Overview
 
 In programming, the [async/await pattern](https://en.wikipedia.org/wiki/Async/await) is a syntactic feature of many programming languages that allows an asynchronous, non-blocking function to be structured in a similar way to an ordinary synchronous function.