fix: make download button accessible via keyboard

[morsko1]

Make download button accessible via keyboard.

Description

Download button was implemented using div tag. That's why it was inaccessible via keyboard.

Motivation and Context

Fixes #8881

How Has This Been Tested?

See description in #8881

Screenshots (if appropriate):

Checklist

My PR contains...

• No code changes (src/ is unmodified: changes to documentation, CI, metadata, etc.)
• Dependency changes (any modification to dependencies in package.json)
• Bug fixes (non-breaking change which fixes an issue)
• Improvements (misc. changes to existing features)
• Features (non-breaking change which adds functionality)

My changes...

• are breaking changes to a public API (config options, System API, major UI change, etc).
• are breaking changes to a private API (Redux, component props, utility functions, etc.).
• are breaking changes to a developer API (npm script behavior changes, new dev system dependencies, etc).
• are not breaking changes.

Documentation

• My changes do not require a change to the project documentation.
• My changes require a change to the project documentation.
• If yes to above: I have updated the documentation accordingly.

Automated tests

• My changes can not or do not need to be tested.
• My changes can and should be tested by unit and/or integration tests.
• If yes to above: I have added tests to cover my changes.
• If yes to above: I have taken care to cover edge cases in my tests.
• All new and existing tests passed.

[char0n]

@morsko1 you've change the order of Copy and Download buttons. Any particular reason?

[morsko1]

@morsko1 you've change the order of Copy and Download buttons. Any particular reason?

@char0n Actually, the button order in the template was incorrect. The Copy button is displayed before the Download button in the UI (you can see that in Petstore example).

So, I have updated the button order and changed the tag of the Download button from div to button.

As a result, the keyboard navigation works as expected.

[char0n]

LGTM! I can confirm keyboard navigation now works by running the branch locally. Thanks for contributing!