clean up syntax

Author: jlin27

fern/docs/pages/0x-swap-api/guides/swap-tokens-with-0x-swap-api.mdx

@@ -254,7 +254,7 @@ For detailed instructions, see [how to set your token allowances](/docs/0x-swap-
 
 - The correct allowance target is returned in `issues.allowance.spender` or `allowanceTarget`.
 
-</NWarningote>
+</Warning>
 
 <Tip>
   When setting the token allowance, make sure to provide enough allowance for