* Update 104-accessibility.md
What I did: added new resource item
Why I chose it: Helped me several times to find a) a starting point on how to build an accessible web experience regarding a specific component and b) provides usually links with in-depth examples
* Update content/roadmaps/100-frontend/content/101-html/104-accessibility.md
Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>
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