Modification the max current setting of the kikusui agent (wire grid)

Description

In this pull request, I changed the max current setting about the wire grid kikusui agent. It was changed from 3.0 A to 4.5 A. The kikusui power supply itself supports 18 V-5 A max in its specification. And this change will increase the motor's max torque, so the wire grid can rotate under lower temperatures.

Motivation and Context

Now the wire grid used for SAT-MF2 has an issue in that it cannot rotate under low ambient temperature, even though the grease in its bearing has temperature resistance. When I checked the rotation directly, the rotator can move with a small additional torque support by hand. Then, to make the rotation robust, we want to change the max current setting to 4.5 A.

How Has This Been Tested?

At the site, I changed the settings of the kikusui power supply manually, and confirmed the grid can rotate at 4.5 A max. Further, the over current protection in the hardware is now set at 4.9 A. So this change makes the rotation easy for the OCS operation as well.

Types of changes

[x] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

[x] My code follows the code style of this project.
[x] My change requires a change to the documentation.
[x] I have updated the documentation accordingly.

simonsobs / socs