fix: confirm screen shows wrong buyAsset

[NeOMakinG]

Description

The swapper confirm screen was using the buyAsset of the first hop instead of the last hop

Issue (if applicable)

closes #8494

Risk

Low (presentational)

High Risk PRs Require 2 approvals

What protocols, transaction types, wallets or contract interactions might be affected by this PR?

Testing

• Do a multihop swap (both new trade flow and old trade flow are affected, you can test both but the logic remain very similar)
• Confirm screen should show the correct buyAsset

Engineering

n/a

Operations

n/a

• 🏁 My feature is behind a flag and doesn't require operations testing (yet)

Screenshots (if applicable)

w

[0xApotheosis]

gm