Discuss replacing HTML with Markdown in documentation

[coderabbitai[bot]]

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This issue is to discuss and determine the replacement of HTML tags with Markdown in the documentation for better compatibility and readability across various markdown renderers. This suggestion was raised during the review of PR https://github.com/home-assistant/home-assistant.io/pull/33388 and specifically discussed in this comment: https://github.com/home-assistant/home-assistant.io/pull/33388#discussion_r1650548503.

Requested by @Hedda.