Fix Ender-5 Z axis settings (#14605)

config/examples/Creality/Ender-5/Configuration.h

 // Invert the stepper direction. Change (or reverse the motor connector) if an axis goes the wrong way.
 #define INVERT_X_DIR true
 #define INVERT_Y_DIR true
-#define INVERT_Z_DIR false
+#define INVERT_Z_DIR true
 
 // @section extruder
 

config/examples/Creality/Ender-5/Configuration_adv.h

 #define DEFAULT_STEPPER_DEACTIVE_TIME 120
 #define DISABLE_INACTIVE_X true
 #define DISABLE_INACTIVE_Y true
-#define DISABLE_INACTIVE_Z true  // Set to false if the nozzle will fall down on your printed part when print has finished.
+#define DISABLE_INACTIVE_Z false  // Set to false if the nozzle will fall down on your printed part when print has finished.
 #define DISABLE_INACTIVE_E true
 
 #define DEFAULT_MINIMUMFEEDRATE       0.0     // minimum feedrate