jupyter export latex missing label workaround

In jupyter lab, use \mylabel instead of \label e.g 

<img src="if.png" alt="if example flowchart" style="width: 400px;"/>
\begin{figure}
\centering
\includegraphics{if.png}
\caption{if 流程圖}
\mylabel{fig:if 流程圖}
\end{figure}

After export to LaTeX, run 

/home/chiao/scripts/mkLectNote_clean_tex.sh chapterXX.tex