fix(core): add minor changes to address form layout

[bc-alexsaiannyi]

What/Why?

The PR adds changes to address form layout like:

• gap between form elements reduced to gap-y-3
• removing top margin on heading;

Testing

locally

[vercel[bot]]

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Name	Status	Preview	Comments	Updated (UTC)
catalyst-latest	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 15, 2024 8:07am

6 Skipped Deployments

| Name | Status | Preview | Comments | Updated (UTC) | | :--- | :----- | :------ | :------- | :------ | | **catalyst** | ⬜️ Ignored ([Inspect](https://vercel.com/bigcommerce-platform/catalyst/CgnMyQqQqJwdU8iG2viGna1YPxB3)) | | | Jul 15, 2024 8:07am | | **catalyst-1millionproducts-store** | ⬜️ Ignored ([Inspect](https://vercel.com/bigcommerce-platform/catalyst-1millionproducts-store/FKmMC21pjKpzxK1J9QEBdm3AUCab)) | [Visit Preview](https://catalyst-1millionproducts-store-git-119b7f-bigcommerce-platform.vercel.app) | | Jul 15, 2024 8:07am | | **catalyst-au** | ⬜️ Ignored ([Inspect](https://vercel.com/bigcommerce-platform/catalyst-au/b1DR9qg6HpKph8vMrhQ6Yw6ZMiXW)) | [Visit Preview](https://catalyst-au-git-update-address-form-5cb0c1-bigcommerce-platform.vercel.app) | | Jul 15, 2024 8:07am | | **catalyst-test-store** | ⬜️ Ignored ([Inspect](https://vercel.com/bigcommerce-platform/catalyst-test-store/7VajcWL5HqdYDsZtJtSyNQ5ekDk9)) | [Visit Preview](https://catalyst-test-store-git-update-addr-8a2fd9-bigcommerce-platform.vercel.app) | | Jul 15, 2024 8:07am | | **catalyst-uk** | ⬜️ Ignored ([Inspect](https://vercel.com/bigcommerce-platform/catalyst-uk/4aqhByhdpHvig82WpFyagbajFKug)) | [Visit Preview](https://catalyst-uk-git-update-address-form-8bcfa8-bigcommerce-platform.vercel.app) | | Jul 15, 2024 8:07am | | **catalyst-unstable** | ⬜️ Ignored ([Inspect](https://vercel.com/bigcommerce-platform/catalyst-unstable/GX3MhFSupfztWqnn9j6px4P7BYEd)) | [Visit Preview](https://catalyst-unstable-git-update-addres-15d0db-bigcommerce-platform.vercel.app) | | Jul 15, 2024 8:07am |

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: af76b3138ae7c1d7bc34d7d02f8e8e05ef329f04

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | -------------------------- | ----- | | @bigcommerce/catalyst-core | Patch |

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions[bot]]

⚡️🏠 Lighthouse report

Lighthouse ran against https://catalyst-latest-7jd6z6o90-bigcommerce-platform.vercel.app

🖥️ Desktop

We ran Lighthouse against the changes on a desktop and produced this report. Here's the summary:

Category	Score
🟢 Performance	100
🟢 Accessibility	100
🟢 Best practices	96
🟠 SEO	82

📱 Mobile

We ran Lighthouse against the changes on a mobile and produced this report. Here's the summary:

Category	Score
🟢 Performance	96
🟢 Accessibility	100
🟢 Best practices	96
🟠 SEO	85