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>

config/kit-voron2-250mm.cfg

@@ -227,14 +227,14 @@ gcode:
 [quad_gantry_level]
 #   Use QUAD_GANTRY_LEVEL to level a gantry.
 gantry_corners:
-   -55,-7
+   -55, -7
    305, 320
 #   Min & Max gantry corners - measure from nozzle at MIN (0,0) and MAX (250,250) to respective belt positions
 points:
-   25,0
-   25,200
-   225,200
-   225,0
+   25, 0
+   25, 200
+   225, 200
+   225, 0
 #   Probe points
 speed: 200
 horizontal_move_z: 6