Fix typo in DLA demo demo.py (#1605)

Fix list of generators in the Ising-type Lie algebras section

Closes #1563 .

Author: CatalinaAlbornoz

demonstrations_v2/tutorial_liealgebra/demo.py

@@ -245,7 +245,7 @@
 ##############################################################################
 # The only new operator here is :math:`iY_0 Y_1,` which we add to the list of the DLA.
 # We could continue this process with a second nesting layer but will find that no new operators are added past this point.
-# We finally end up with the DLA :math:`\{X_0 X_1, Z_0, Z_1, iY_0 X_1, iX_0 Y_1, iY_0 Y_1\}`
+# We finally end up with the DLA :math:`\{iX_0 X_1, iZ_0, iZ_1, iY_0 X_1, iX_0 Y_1, iY_0 Y_1\}`
 
 for op in dla.basis:      
     print(op)
@@ -453,4 +453,4 @@ def IsingGenerators(n, bc="open"):
 #     "Quantum Computation, Complexity, and Many-Body Physics"
 #     `arXiv:quant-ph/0512209 <https://arxiv.org/abs/quant-ph/0512209>`__, 2005.
 #
-#
+#