Updated tutorial 2 to use fractional_site not fsite

Author: elinscott

tutorials/tutorial_2/si.json

@@ -45,7 +45,7 @@
         "w90": {
             "bands_plot": true,
             "projections": [[{"fractional_site": [ 0.25, 0.25, 0.25 ], "ang_mtm": "sp3"}],
-                            [{"fsite": [ 0.25, 0.25, 0.25 ], "ang_mtm": "sp3"}]],
+                            [{"fractional_site": [ 0.25, 0.25, 0.25 ], "ang_mtm": "sp3"}]],
             "dis_froz_max": 10.6,
             "dis_win_max": 16.9
         },