Update Migaloo Chain version used in CI to v4.2.0

[ljoss17]

Commit

cd45e53

Proposal

Update the version of Migaloo Chain used in the CI.

• Current version: v4.1.3

  hermes/flake.lock

  Line 1124 in cd45e53

  "ref": "v4.1.3",

• Latest 05.08.2024: v4.2.0 taken from https://github.com/White-Whale-Defi-Platform/migaloo-chain/releases

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