hwmon: (f71882fg) Fix grammar in fan speed trip points explanation

Fix several grammatical issues in the fan speed trip points documentation:
- Replace awkward "which % the fan should run at at" construction with
 clearer "that specify the percentage at which"
- Fix incorrect "is chip depended" to "are chip dependent" for correct
 verb agreement and adjective form
- Improve readability by reorganizing first sentence and separating the
 complex explanation into simpler parts
- Add hyphen before "see" to improve readability
- Remove redundant "at" in temperature description

No functional changes, documentation only.

Signed-off-by: Abhinav Saxena <xandfury@gmail.com>
Message-ID: <20241107013849.47833-1-xandfury@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>