Add Z_PROBE_LOW_POINT to example configs

Marlin/example_configurations/FolgerTech/i3-2020/Configuration.h

@@ -750,6 +750,8 @@
 #define Z_CLEARANCE_BETWEEN_PROBES  3 // Z Clearance between probe points
 //#define Z_AFTER_PROBING           3 // Z position after probing is done
 
+#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+
 // For M851 give a range for adjusting the Z probe offset
 #define Z_PROBE_OFFSET_RANGE_MIN -20
 #define Z_PROBE_OFFSET_RANGE_MAX 20

Marlin/example_configurations/FolgerTech/i3-2020/Configuration_adv.h

@@ -473,7 +473,8 @@
 
 //#define DIGIPOT_MCP4018          // Requires library from https://github.com/stawel/SlowSoftI2CMaster
 #define DIGIPOT_I2C_NUM_CHANNELS 8 // 5DPRINT: 4     AZTEEG_X3_PRO: 8
-// Actual motor currents in Amps, need as many here as DIGIPOT_I2C_NUM_CHANNELS
+// Actual motor currents in Amps. The number of entries must match DIGIPOT_I2C_NUM_CHANNELS.
+// These correspond to the physical drivers, so be mindful if the order is changed.
 #define DIGIPOT_I2C_MOTOR_CURRENTS { 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 }  //  AZTEEG_X3_PRO
 
 //===========================================================================