docs(iota-wiki): update V1.3

docs/build/isc/v1.3/docs/how-tos/core-contracts/token/send-token-across-chains.mdx

@@ -111,7 +111,7 @@ function sendCrossChainMessage(
     }
 }
 ```
-## Conclution
+## Conclusion
 
 By following this guide, you have learned how to set up your development environment and use the `sendCrossChain` function in the [`NativeTokenController.sol`](https://github.com/iotaledger/isc-cross-chain/blob/master/contracts/NativeTokenController.sol) contract to send native tokens across chains. You can now interact with the `sendCrossChain` function within your own smart contracts to facilitate cross-chain token transfers.