🐛 Bug: details marker shows next to hamburger menu on mobile

[troyciesco]

Bug Report Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Expected

The little arrow for the details/summary elements in the header should be hidden, because the hamburger menu replaces it.

Actual

On mobile browsers (chromium and firefox, iOS) the details marker is showing next to the hamburger menu:

It doesn't happen on desktop browsers, even using the dev tools.

Additional Info

It's one style change and I had to fork the code to look at it anyway, so I'm happy to submit a PR!

I'm reasonably confident that there are no accessibility issues (keyboard functionality still worked) and that this works for both chromium and firefox, at least on iOS:

	summary::-webkit-details-marker {
		display: none;
	}

[JoshuaKGoldberg]

Aha! I could have sworn I'd seen this in the past on mobile Safari, and fixed it... but apparently not. Thanks for reporting @troyciesco; we'd love a PR if you have time!

[JoshuaKGoldberg]

@all-contributors please add @troyciesco for bug.

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[allcontributors]

@JoshuaKGoldberg

I've put up a pull request to add @troyciesco! 🎉