fix(Client): remove extra slash

[fubuloubu]

trafficstars

What I did

This fixes an issue when it displays the tx or address explorer URLs, it adds an extra slash e.g. https://etherscan.io//tx/0x...

Etherscan will not take you to the correct page when this happens

How I did it

How to verify it

Checklist

• [x] Passes all linting checks (pre-commit and CI jobs) ~~- [ ] New test cases have been added and are passing~~ ~~- [ ] Documentation has been updated~~
• [x] PR title follows Conventional Commit standard (will be automatically included in the changelog)