Update US surface snapshot for small Populace default

[MaxGhenis]

Summary

• updates the US household calculator surface snapshot for the smaller default Populace bundle merged in Use small Populace US bundle by default #443
• adds the changelog fragment needed for the release workflow to proceed

Validation

• uv run ruff format --check .
• uv run ruff check .
• git diff --check
• uv run --extra models pytest tests/test_household_calculator_snapshot.py -q
• uv run --extra models pytest tests/test_bundle.py tests/test_release_manifests.py tests/test_models.py tests/test_us_regions.py tests/test_certify_data_release.py -q