build(deps): bump pyinstaller from 6.19.0 to 6.20.0

Bumps [pyinstaller](https://github.com/pyinstaller/pyinstaller) from 6.19.0 to 6.20.0.
- [Release notes](https://github.com/pyinstaller/pyinstaller/releases)
- [Changelog](https://github.com/pyinstaller/pyinstaller/blob/develop/doc/CHANGES.rst)
- [Commits](https://github.com/pyinstaller/pyinstaller/compare/v6.19.0...v6.20.0)

---
updated-dependencies:
- dependency-name: pyinstaller
  dependency-version: 6.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -2,7 +2,7 @@ requests==2.33.1
 PySide6-Essentials==6.11.0
 beautifulsoup4==4.14.3
 darkdetect==0.7.1
-pyinstaller==6.19.0
+pyinstaller==6.20.0
 PyQtDarkTheme-fork==2.3.6
 plyer==2.1.0
 psutil==7.2.2