Update configuration.h

Add another comment for thermistor 13 ,use with Hotend "Simple ONE & All In ONE"

Marlin/Configuration.h

 // 10 is 100k RS thermistor 198-961 (4.7k pullup)
 // 11 is 100k beta 3950 1% thermistor (4.7k pullup)
 // 12 is 100k 0603 SMD Vishay NTCS0603E3104FXT (4.7k pullup) (calibrated for Makibox hot bed)
-// 12 is 100k Hisens 3950  1% up to 300°C for hotend "Simple ONE " & "Hotend "All In ONE" 
+// 13 is 100k Hisens 3950  1% up to 300°C for hotend "Simple ONE " & "Hotend "All In ONE" 
 // 20 is the PT100 circuit found in the Ultimainboard V2.x
 // 60 is 100k Maker's Tool Works Kapton Bed Thermistor beta=3950
 //