docs: Docs comma culture (#4822)

Many non-English speaking countries use a comma as a decimal separator for printed numbers. This can create some confusion in documentation and config files when not surrounded by contextual clues like parenthesis.  Improve documentation by adding spaces to coordinates.

Signed-off-by: Paul McGowan <mental450@gmail.com>

docs/BLTouch.md

@@ -28,7 +28,7 @@ move to the center of the bed, and home the z axis. For example:
 
 ```
 [safe_z_home]
-home_xy_position: 100,100 # Change coordinates to the center of your print bed
+home_xy_position: 100, 100 # Change coordinates to the center of your print bed
 speed: 50
 z_hop: 10                 # Move up 10mm
 z_hop_speed: 5