Use valid redeemable_type value

[marklevi]

Use valid redeemable_type (gift-card vs gift_card) in the extension-to-toml tests

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've made sure that any changes to dev or deploy have been reflected in the internal flowchart.

[github-actions]

Thanks for your contribution!

Depending on what you are working on, you may want to request a review from a Shopify team:

• Themes: @shopify/advanced-edits
• UI extensions: @shopify/ui-extensions-cli
  • Checkout UI extensions: @shopify/checkout-ui-extensions-api-stewardship
• Hydrogen: @shopify/hydrogen
• Other: @shopify/cli-foundations

[github-actions]

We detected some changes at either packages/*/src or packages/cli-kit/assets/cli-ruby/** and there are no updates in the .changeset.
If the changes are user-facing, run "pnpm changeset add" to track your changes and include them in the next release CHANGELOG.

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	72.31%	6929/9582
🟡	Branches	69.44%	3406/4905
🟡	Functions	71.3%	1853/2599
🟡	Lines	73.51%	6530/8883

Test suite run success

1654 tests passing in 765 suites.

Report generated by 🧪jest coverage report action from aa9859b