chore: update releases.toml for forc-client-0.71.2

[github-actions]

Auto-generated PR to update releases.toml after publishing forc-client-0.71.2.

This tracks the dependency versions used in this release for compatibility reference.

[cursor]

PR Summary

Low Risk
Low risk: metadata-only update to releases.toml with no runtime or behavioral code changes.

Overview
Records the new forc-client 0.71.2 release in releases.toml, including the release date and the dependency versions (sway, fuel-core-types, fuels-rs) it was built against.

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