Adding second missing https:// instance [ci skip]

Author: cwehmeyer

manuscript/manuscript.tex

@@ -633,7 +633,7 @@ \subsection{Advanced Methods}
 Other deep learning methods for performing the dimension reduction~\cite{tae},
 finding reaction coordinates for enhanced sampling~\cite{hernandez-vde,Sultan2018-vde-enhanced-sampling,Ribeiro2018-rave},
 and generative MSMs~\cite{deep-gen-msm-preprint} have been put forward and are likely to spawn an active field of research in its own right.
-Implementations of some of these methods are available or are under development in the deeptime package \url{github.com/markovmodel/deeptime}. 
+Implementations of some of these methods are available or are under development in the deeptime package \url{https://github.com/markovmodel/deeptime}. 
 
 \section{Author Contributions}
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