Update SpineAnimationTrack.cpp (#2578)

Fix: Invalid PROPERTY_HINT_RANGE with hint "0,256,0": Step cannot be 0.

spine-godot/spine_godot/SpineAnimationTrack.cpp

@@ -78,7 +78,7 @@ void SpineAnimationTrack::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::STRING, "animation_name", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_STORAGE | PROPERTY_USAGE_INTERNAL | PROPERTY_USAGE_NOEDITOR), "set_animation_name", "get_animation_name");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "loop", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_STORAGE | PROPERTY_USAGE_INTERNAL | PROPERTY_USAGE_NOEDITOR), "set_loop", "get_loop");
 
-	ADD_PROPERTY(PropertyInfo(Variant::INT, "track_index", PROPERTY_HINT_RANGE, "0,256,0"), "set_track_index", "get_track_index");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "track_index", PROPERTY_HINT_RANGE, "0,256,1"), "set_track_index", "get_track_index");
 	ADD_PROPERTY(PropertyInfo(VARIANT_FLOAT, "mix_duration"), "set_mix_duration", "get_mix_duration");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "hold_previous"), "set_hold_previous", "get_hold_previous");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "reverse"), "set_reverse", "get_reverse");