fix: minimum temperature & update links

[River-Mochi]

Description

• fix F min temperature to 50C per 2.21 IronOS changes because 60F does not = 10C.
• update links in Readme

Related Issues

closes ticket https://github.com/builder555/PineSAM/issues/182

Checklist

• [X] I have tested my changes locally and they work as expected.
• [X] I have updated the documentation, if applicable.
• [X] I have added appropriate tests, if applicable.

[builder555]

@River-Mochi let me know when you're done with commits, i'll merge it.

[River-Mochi]

@River-Mochi let me know when you're done with commits, i'll merge it.

I'm done now