Change Markus entry in the about page.

docs/src/about.md

@@ -11,7 +11,7 @@ The following people contributed
 * Even Stephansen Kjemsås contributed to the implementation of the [Frank Wolfe Method](solvers/FrankWolfe.md) solver
 * Mathias Ravn Munkvold contributed most of the implementation of the [Adaptive Regularization with Cubics](solvers/adaptive-regularization-with-cubics.md) solver
 * [Tom-Christian Riemer](https://www.tu-chemnitz.de/mathematik/wire/mitarbeiter.php) implemented the [trust regions](solvers/trust_regions.md) and [quasi Newton](solvers/quasi_Newton.md) solvers.
-* Markus Stokkenes provided the first implementation the [Interior Point Newton Method](solvers/interior_point_Newton.md)
+* [Markus A. Stokkenes](https://www.linkedin.com/in/markus-a-stokkenes-b41bba17b/) provided the first implementation the [Interior Point Newton Method](solvers/interior_point_Newton.md)
 * [Manuel Weiss](https://scoop.iwr.uni-heidelberg.de/author/manuel-weiß/) implemented most of the [conjugate gradient update rules](@ref cg-coeffs)
 
 as well as various [contributors](https://github.com/JuliaManifolds/Manopt.jl/graphs/contributors) providing small extensions, finding small bugs and mistakes and fixing them by opening [PR](https://github.com/JuliaManifolds/Manopt.jl/pulls)s.