Fix spelling.

Firmware/Marlin_main.cpp

@@ -8229,7 +8229,7 @@ void bed_check(float x_dimension, float y_dimension, int x_points_num, int y_poi
 	float bed_zero_ref_y = (-0.6f + Y_PROBE_OFFSET_FROM_EXTRUDER);
 
 	float mesh_home_z_search = 4;
-	float measure_z_heigth = 0.2f;
+	float measure_z_height = 0.2f;
 	float row[x_points_num];
 	int ix = 0;
 	int iy = 0;
@@ -8264,7 +8264,7 @@ void bed_check(float x_dimension, float y_dimension, int x_points_num, int y_poi
 	}
 	st_synchronize();
 	*/
-		destination[Z_AXIS] = measure_z_heigth;
+		destination[Z_AXIS] = measure_z_height;
 		plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], Z_LIFT_FEEDRATE, active_extruder);
 		for(int8_t i=0; i < NUM_AXIS; i++) {
 			current_position[i] = destination[i];

Firmware/first_lay_cal.cpp

@@ -128,19 +128,19 @@ void lay1cal_before_meander()
 
 //! @brief Count extrude length
 //!
-//! @param layer_heigth layer heigth in mm
+//! @param layer_height layer height in mm
 //! @param extrusion_width extrusion width in mm
 //! @param extrusion_length extrusion length in mm
 //! @return filament length in mm which needs to be extruded to form line
-static constexpr float count_e(float layer_heigth, float extrusion_width, float extrusion_length)
+static constexpr float count_e(float layer_height, float extrusion_width, float extrusion_length)
 {
-    return (extrusion_length * layer_heigth * extrusion_width / (M_PI * pow(1.75, 2) / 4));
+    return (extrusion_length * layer_height * extrusion_width / (M_PI * pow(1.75, 2) / 4));
 }
 
 static const float width = 0.4; //!< line width
 static const float length = 20 - width; //!< line length
-static const float heigth = 0.2; //!< layer height TODO This is wrong, as current Z height is 0.15 mm
-static const float extr = count_e(heigth, width, length); //!< E axis movement needed to print line
+static const float height = 0.2; //!< layer height TODO This is wrong, as current Z height is 0.15 mm
+static const float extr = count_e(height, width, length); //!< E axis movement needed to print line
 
 //! @brief Print meander
 //! @param cmd_buffer character buffer needed to format gcodes
@@ -199,7 +199,7 @@ void lay1cal_meander(char *cmd_buffer)
 //! @param i iteration
 void lay1cal_square(char *cmd_buffer, uint8_t i)
 {
-    const float extr_short_segment = count_e(heigth, width, width);
+    const float extr_short_segment = count_e(height, width, width);
 
     static const char fmt1[] PROGMEM = "G1 X%d Y%-.2f E%-.3f";
     static const char fmt2[] PROGMEM = "G1 Y%-.2f E%-.3f";