Update index.md

Author: ttuff

docs/index.md

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 <p style="text-align: right;"><a href="https://github.com/CU-ESIIL/Project_group_OASIS/edit/main/docs/index.md" title="Edit this page">✏️</a></p>
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 <!-- =========================================================
 HERO (Swap hero.jpg, title, strapline, and the three links)
 ========================================================= -->