update week 15

Author: mhjensen

doc/src/week15/Latexnotes/qbm.pdf

@@ -84,7 +84,7 @@
 \section{Recap: Quantum Neural Networks}
 %% ============================================================
 
-\begin{frame}{QNN as a Variational Quantum State (from week15.tex)}
+\begin{frame}{QNN as a Variational Quantum State}
   \begin{columns}[T]
     \column{0.52\textwidth}
       The central object of a \textbf{Quantum Neural Network}: