Update Plans.do.txt

Author: mhjensen

doc/src/FuturePlans/Plans.do.txt

@@ -14,6 +14,7 @@ o Improve notes on VQE with more examples and how to make circuits
 o Add examples with different Hamiltonians
 o Add examples on Jordan-Wigner transformations
 o Include discussions of algorithms such as the Rodeo algo, and how to write codes
+o Add material about quantum machine learning and Boltzmann machines in particular
 o Reshape projects and add weekly exercises
 o Develop library of codes from scratch
 o Make textbook as jupyter-book and latex textbook