clean up changelog syntax

Author: jlin27

fern/docs/changelog/2026-04-13.mdx

@@ -25,4 +25,4 @@ tags: []
 #### New Features
 
 - **Smart account signatures in Gasless API:** Raw signatures from ERC-4337 smart wallets are now accepted in the Gasless API.
-- **`wrapUnwrapMode` in Swap API:** Controls how native wrap/unwrap trades are executed — direct (default) calls the wrapped-native contract directly, settler routes through Settler or AllowanceHolder for compatibility. [See more](https://docs.0x.org/api-reference/openapi-json/swap/allowanceholder-getprice#request.query.wrapUnwrapMode)
+- **`wrapUnwrapMode` in Swap API:** Controls how native wrap/unwrap trades are executed — `direct` (default) calls the wrapped-native contract directly, `settler` routes through Settler or AllowanceHolder for compatibility. [See more](https://docs.0x.org/api-reference/openapi-json/swap/allowanceholder-getprice#request.query.wrapUnwrapMode)