eeprom size fix (#7969)

keyboards/nk65/config.h

@@ -140,7 +140,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Backlight config starts after VIA's EEPROM usage,
 // dynamic keymaps start after this.
-#define VIA_EEPROM_CUSTOM_CONFIG_SIZE 31
+#define VIA_EEPROM_CUSTOM_CONFIG_SIZE 32
 
 // VIA lighting is handled by the keyboard-level code
 #define VIA_CUSTOM_LIGHTING_ENABLE