fix (python01 - ex Vector): fixing a wrong example about dot product.

Author: madvid

module01/subject/en.subject.tex

@@ -491,7 +491,7 @@ \section*{Examples}
   v4 = Vector([[2.0, 4.0]])
   print(v3.dot(v4))
   # Expected output:
-  # 13.0
+  # 14.0
 
   v1
   # Expected output: to see what __repr__() should do
@@ -943,4 +943,4 @@ \section*{Acknowledgements}
 \vfill
 \doclicenseThis
 
-\end{document}
+\end{document}