Clear up misleading egg step name

include/egg_hatch.h

@@ -4,7 +4,7 @@
 void ScriptHatchMon(void);
 bool8 CheckDaycareMonReceivedMail(void);
 void EggHatch(void);
-u8 GetEggStepsToSubtract(void);
+u8 GetEggCyclesToSubtract(void);
 u16 CountPartyAliveNonEggMons(void);
 
 #endif // GUARD_EGG_HATCH_H