UPSTREAM: power: supply: core: Update sysfs-class-power ABI document

Add the "Over Current" string to /sys/class/power_supply/<supply_name>/health
description.

Bug: 149071038
Test: Builds

Fixes: e3e83cc601e57 ("power: supply: core: Add POWER_SUPPLY_HEALTH_OVERCURRENT constant")
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
(cherry picked from commit 333853be564526ecd74e9cbdf3e28650a47ad85d)
Signed-off-by: Sandeep Patil <sspatil@google.com>
Change-Id: Icd423387bde55285bd18d6871bba6f37efd2e034