🐛 Bug: Accessibility issue on mochajs.org: missing alt text

[JoshuaKGoldberg]

Bug Report Checklist

• I have read and agree to Mocha's Code of Conduct and Contributing Guidelines
• I have searched for related issues and issues with the faq label, but none matched my issue.
• I have 'smoke tested' the code to be tested by running it outside the real test suite to get a better sense of whether the problem is in the code under test, my usage of Mocha, or Mocha itself.
• I want to provide a PR to resolve this

Expected

The website should not have any accessibility issues - including ones detectable by the axe browser devtools.

Actual

The Netlify logo in the footer is missing image alt text.

mocha/docs/_includes/default.liquid

Lines 131 to 135 in 509938d

	<div class="netlify-badge">
	<a href="https://www.netlify.com">
	<img src="https://www.netlify.com/img/global/badges/netlify-color-accent.svg" loading="lazy">
	</a>
	</div>

Minimal, Reproducible Example

1. Visit https://mochajs.org
2. Wait for the page to load & fade in
3. Run the axe browser devtools

Versions

n/a

Additional Info

https://web.dev/explore/accessible explains more around web accessibility.

I first ran a Lighthouse accessibility audits but it didn't wait for the page to fade in and reported many false negatives as a result.