SDK: Bump machine emulator to v0.20.0

[brunomenezes]

📚 Context

The next rollups-node alpha.12 will be using the new emulator v0.20.0. So a upgrade is necesssary to be in Sync with upcoming node release.

PS: While the below dependency is not fulfilled a build failure is expected.

Dependencies

For the branch and build to pass

• A release or "temporary" rollups-node using the new emulator. 🟧

📈 Subtasks

• Set CARTESI_MACHINE_EMULATOR_VERSION property to the new version on docker-bake.hcl file.
• Update checksum for both architectures amd64 and arm64 on Dockerfile.
• Verify whether everything is working as expected.