Bump pyside6 from 6.8.1.1 to 6.8.2.1

Bumps [pyside6](https://pyside.org) from 6.8.1.1 to 6.8.2.1.

---
updated-dependencies:
- dependency-name: pyside6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

dev_requirements.txt

@@ -4,6 +4,6 @@ build
 twine
 sphinx
 sphinx-rtd-theme
-Pyside6==6.8.1.1
+Pyside6==6.8.2.1
 qt-material
 mss