Update README after tutorial

AndiH · web-flow · commit a713934e531e · 2021-11-29T18:01:32.000+01:00
diff --git a/README.md b/README.md
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 # SC21 Tutorial: Efficient Distributed GPU Programming for Exascale
 
+Repository with talks and exercises of our [Efficient Distributed GPU Programming for Exascale](https://sc21.supercomputing.org/presentation/?id=tut138&sess=sess188). The tutorial was held virtually, partly recorded, partly live, using JUWELS Booster at JSC.
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 ## Coordinates
 
 * Date: 14 November 2021
