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Hi Folks -
Within Cura v3.5 under Extensions -> Post Processing there is a Modify GCode option. Within the "Post processing plugin" there is an options to "ChangeAtZ 5.1.1 (Experimental)". You can set changes based on layer number or the height. Based on the post from RichGain below, I chose to set 215 at base, then work down -5 C from there to end at 190 C for top.

Layer for my file was set as 0.15 so Cura calculated the height layer for me for this. I did check the gcode file manually and found the updates posted within the file...
;ChangeAtZ V5.1.1: executed at 16.20 mm
M117 Printing... ch@ 16.2
M104 S205.000000 T0