fix: bsc testnet

[constwz]

Make sure these boxes are checked! 📦✅

• You ran ./run_tests.sh
• You ran pre-commit run -a
• If you want to add your network to setup_service.py, provide a link to your
  safe-deployments PR and check network name
  exists in safe-eth-py

What was wrong? 👾

Closes #

How was it fixed? 🎯

[github-actions]

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