Update index.md

Fixes

index.md

@@ -221,7 +221,7 @@ Only regular papers are eligible for the Best Paper Presentation Award (short pa
 
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 ###  <a class="anchor" name="contact">Contact Information</a>
-Please address workshop questions to [Ignacio Laguna](ttps://lagunaresearch.org/) ([email protected]) and/or [Cindy Rubio-González](https://web.cs.ucdavis.edu/~rubio/) ([email protected]).
+Please address workshop questions to [Ignacio Laguna](https://lagunaresearch.org/) ([email protected]) and/or [Cindy Rubio-González](https://web.cs.ucdavis.edu/~rubio/) ([email protected]).
 
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 ### <a class="anchor" name="previous">Previous Workshops</a>