Typo in documentation (`CMP_CUTOUT_BOTTOM`)

[jmickelin]

The name of the variable CMP_CUTOUT_BOTTOM_B is inconsistent in the documentation.

The description says:

value is expected to be a bool and determines whether the bottom of the compartment is cut out. Note that this is ignored if CMP_PEDESTAL_BASE_B is true or if CMP_SHAPE is set to FILLET. e.g. [ CMP_CUTOUT_BOTTOM, true ]

That should be changed from CMP_CUTOUT_BOTTOM to CMP_CUTOUT_BOTTOM_B.