This PR removes the accidentally duplicated .md from this URL: https://www.a11yproject.com/posts/blind-people-need-to-be-considered-more-when-making-data-visualizations.md/.
This PR removes the accidentally duplicated .md from this URL: https://www.a11yproject.com/posts/blind-people-need-to-be-considered-more-when-making-data-visualizations.md/.