Fix explorer link

[anxolin]

Summary

Fix the Explorer link URL. It was wrong for Gnosis Chain. Also addresses the suggestion from @elena-zh to make it more

Before:

And will always take you

After:

And:

• Takes you to the right explorer depending on the network
• The label would be more precise, i.e. "Verify on Blockscout" if network is Gnosis Chain

To Test

1. Do a claiming in the 3 networks. You can use the first two tabs of this file to find dummy examples: https://docs.google.com/spreadsheets/d/1pf97wtawkibZPNTrVbyo2FSZKXf6Xo_A0sddWXKxnE4/edit#gid=1980526507
2. Verify the link, should say "Verify on Etherscan" or "Verify on Blockscout" and take u to the right place

[github-actions]

• 🔭 GP Swap: CoW Protocol v2 Swap UI

[elena-zh]

works for me!

[anxolin]

I will close this one in favour of this other one #2277