Docs: Update default value for geomaps enable_custom_baselayers option (#61880)
Docs: Update default value for geomaps disable_custom_baselayers option
The `disable_custom_baselayers` configuration option name and default
value were inverted in commit e604e69d93,
but the update to the description in the documentation was missed.
(cherry picked from commit 22f51602ba)
Co-authored-by: zsrv <95176387+zsrv@users.noreply.github.com>