Update learn/infrastructure/vaas.md

Co-authored-by: Dawn Kelly <83190195+dawnkelly09@users.noreply.github.com>

Author: ilariae

learn/infrastructure/vaas.md

@@ -71,7 +71,7 @@ Different applications built on Wormhole may specify a format for the payloads a
 
 ### Token Transfer
 
-Tokens are transferred from one chain to another using a lockup/mint and burn/unlock mechanism. While many bridges work on this basic premise, this implementation achieves this by relying on the generic message-passing protocol provided by Wormhole to support routing the lock and burn events from one chain to another. This makes Wormhole's token bridge ultimately chain-agnostic. An implementation can be quickly incorporated into the network if a wormhole contract exists on the chain we wish to transfer to. Due to the generic message-passing nature of Wormhole, programs emitting messages do not need to know anything about the implementation details of any other chain.
+Tokens are transferred from one chain to another using a lockup/mint and burn/unlock mechanism. While many bridges work on this basic premise, this implementation achieves this by relying on the generic message-passing protocol provided by Wormhole to support routing the lock and burn events from one chain to another. This makes Wormhole's token bridge ultimately chain-agnostic. An implementation can be quickly incorporated into the network if a Wormhole contract exists on the chain we wish to transfer to. Due to the generic message-passing nature of Wormhole, programs emitting messages do not need to know anything about the implementation details of any other chain.
 
 To transfer tokens from A to B, we must lock the tokens on A and mint them on B. The tokens on A must be proven to be locked before the minting can occur on B. To facilitate this process, chain A first locks the tokens and emits a message indicating that the locking has been completed. This message has the following structure and is referred to as a transfer message: