docs: hwmon: ltc4283: fix malformed table docs build error

docs: hwmon: ltc4283: fix malformed table docs build error

Expand the table borders (upper & lower) to prevent a documentation
build error:

Documentation/hwmon/ltc4283.rst:261: ERROR: Malformed table.
Text in column margin in table line 3.
=======================         ==========================================
power1_failed_fault_log         Set to 1 by a power1 fault occurring.
power1_good_input_fault_log     Set to 1 by a power1 good input fault occurring at PGIO3.

Fixes: dd63353a0b5e ("hwmon: ltc4283: Add support for the LTC4283 Swap Controller")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20260620011833.3568693-1-rdunlap@infradead.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>