Wie kann ein ylabel in pgfplots groupplot umgebrochen werden?

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\documentclass{scrartcl}
\usepackage{pgfplots}
\usetikzlibrary{pgfplots.groupplots}
\pgfplotsset{width=0.91\textwidth, compat=1.18}
\begin{document}
\section{Test}
Lange ylabel mit groupplot:
\begin{figure}[h]
    \centering
    \begin{tikzpicture}
        \begin{groupplot}[height=5cm, group style={
        group size=1 by 2, ylabels at=edge left}]
            \nextgroupplot[ylabel={Kurze Beschriftung}]
            \nextgroupplot[ylabel={Zu lange Beschriftung, die eigentlich umbrechen sollte}, 
            xlabel={Kurze Beschriftung}]
        \end{groupplot}
    \end{tikzpicture}
    \caption{Mit \texttt{groupplot} erzeugter plot}
\end{figure}
Lange ylabel mit normaler axis:
\begin{figure}[h]
    \centering
    \begin{tikzpicture}
        \begin{axis}[xlabel={Kurze Beschriftung}, 
        ylabel={Lange Beschriftung\\ die tatsächlich\\ umbricht}, height=5cm, 
        align=center]
        \end{axis}
    \end{tikzpicture}
    \caption{Mit \texttt{axis} erzeugter plot}
\end{figure}
\end{document}
 
 
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