Update docs/userguides/contracts.md

Co-authored-by: antazoey <[email protected]>

docs/userguides/contracts.md

@@ -255,7 +255,7 @@ Create a sequence of calls to execute at once using `eth_sendTransaction` via th
 Execute the Multicall transaction.
 The transaction will broadcast again every time the `Transaction` object is called.
 
-### Usage example:
+### Multi-transaction Example
 
 ```py
 from ape_ethereum import multicall