fix(l2): update default bridge address

[avilagaston9]

Motivation

The L2 Dev workflow is failing because is using an outdated common bridge address.

Description

• Updates DEFAULT_BRIDGE_ADDRESS.
• L2: use health endpoint to retireve contract addresses in our integration tests #4852 was created to retrieve the contract addresses using the health endpoint instead.

Closes None

[Copilot]

Pull Request Overview

This PR fixes the L2 Dev workflow by updating the default bridge address to a current deployment. The previous hardcoded bridge address was outdated and causing workflow failures.

• Updates the DEFAULT_BRIDGE_ADDRESS constant to a new valid address
• Updates the corresponding comment documentation to reflect the new address

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