update foxwallet logo

[web3luhao]

Description

we are changing logo

PLEASE NOTE- Checklist must be complete prior to review.

Checklist

• [x] Increment the version field in package.json of the package you have made changes in following semantic versioning and using alpha release tagging
• [x] Check the box that allows repo maintainers to update this PR
• [x] Test locally to make sure this feature/fix works
• [x] Run yarn check-all to confirm there are not any associated errors
• [x] Confirm this PR passes Circle CI checks
• [x] Add or update relevant information in the documentation