Correct gMax 1.5+ nozzle size to the right number

Also...   Doing a 'Direct Commit' to see if that is 'acceptable' for small changes like this.   I want to look at the commit history and see how the logs handle this type of change.

Marlin/example_configurations/gCreate/gMax1.5+/Configuration.h

@@ -1709,8 +1709,8 @@
  * 
  */
 #define DEFAULT_NOMINAL_FILAMENT_DIA 1.75   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
-#define DEFAULT_NOZZLE_SIZE           .4    // (mm) Diameter of primary nozzle.  Used by G26 Mesh Validation Pattern tool.
-#define DEFAULT_LAYER_HEIGHT          .2    // (mm) Default layer height that will produce usable results by the printer.  Used by G26 Mesh Validation Pattern tool.
+#define DEFAULT_NOZZLE_SIZE           .5    // (mm) Diameter of primary nozzle.  Used by G26 Mesh Validation Pattern tool.
+#define DEFAULT_LAYER_HEIGHT          .35   // (mm) Default layer height that will produce usable results by the printer.  Used by G26 Mesh Validation Pattern tool.
 #define DEFAULT_HOTEND_TEMP        205.0    // (c)  Default nozzle temperature that will produce usable results by the printer.  Used by G26 Mesh Validation Pattern tool.
 #define DEFAULT_BED_TEMP            60.0    // (c)  Default bed temperature that will produce usable results by the printer.  Used by G26 Mesh Validation Pattern tool.