docs: Update BLTouch.md to prevent position_endstop error (#4731)

Klipper with Fluid complains about `position_endstop` line if `endstop_pin:
probe:z_virtual_endstop` used

Signed-off-by: Ilia Rebane <Agilatosay@gmail.com>
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Ilia Rebane 2021-10-15 11:55:20 -04:00 committed by GitHub
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@ -22,8 +22,8 @@ control_pin: P1.26
```
If the BL-Touch will be used to home the Z axis then set `endstop_pin:
probe:z_virtual_endstop` in the `[stepper_z]` config section and add a
`[safe_z_home]` config section to raise the z axis, home the xy axes,
probe:z_virtual_endstop` and remove `position_endstop` in the `[stepper_z]` config section,
then add a `[safe_z_home]` config section to raise the z axis, home the xy axes,
move to the center of the bed, and home the z axis. For example:
```