chore(Footer): Fix heading hierarchy

[alimpens]

Describe the pull request

Thank you for contributing to the project!
Please use this template to help us handle your PR smoothly.

What

This removes the Heading level 1 from our Footer examples. It also changes a section to a div, a section should not be used for styling purposes only.

Why

According to these docs, there should only be 1 h1 on the page. This means our docs were incorrect.

How

Removed the heading, changed the tag.

Checklist

Before submitting your pull request, please ensure you have done the following. Check each checkmark if you have done so or if it wasn't necessary:

• Add or update unit tests
• Add or update documentation
• Add or update stories
• Add or update exports in index.* files
• Start the PR title with a Conventional Commit prefix, as explained here.

[VincentSmedinga]

Let’s consider marking updates to our recommended markup as features instead of chores. If people have implemented this markup before, they should be aware of our changes to it and apply them in their project.

[alimpens]

Let’s consider marking updates to our recommended markup as features instead of chores. If people have implemented this markup before, they should be aware of our changes to it and apply them in their project.

This wouldn't have any effect. This change touches the Storybook package, which we don't release. So it will not be added to any changelog.