Fixed apiUrl for polygon networks

[sanketsaagar]

• This PR fixes the apiUrl for polygon networks. After the migration of Ethereum api to v2, now we have to use a fixed apiUrl link for all the chains proceeding to which, only the chainID need to changed.

That means we now have to use https://api.etherscan.io/v2/api as your base path, and include a chainid for your target network (e.g., 1 for Ethereum).

So just to give you an example for polygon it should look like
https://api.etherscan.io/v2/api?chainid=137&action=balance&apikey=YourEtherscanApiKey

And for Amoy it should look like
https://api.etherscan.io/v2/api?chainid=80002&action=balance&apikey=YourEtherscanApiKey

[changeset-bot]

🦋 Changeset detected

Latest commit: 63dbd93

The changes in this PR will be included in the next version bump.

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