fix(deps): bump spidev from 3.5 to 3.8

Bumps [spidev](https://github.com/doceme/py-spidev) from 3.5 to 3.8.
- [Release notes](https://github.com/doceme/py-spidev/releases)
- [Changelog](https://github.com/doceme/py-spidev/blob/master/CHANGELOG.md)
- [Commits](https://github.com/doceme/py-spidev/compare/v3.5...v3.8)

---
updated-dependencies:
- dependency-name: spidev
  dependency-version: '3.8'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,5 +1,5 @@
 RPi.GPIO==0.7.1
-spidev==3.5
+spidev==3.8
 Pillow==9.4.0
 numpy==2.1.3
 rich==13.9.4