build(deps-dev): bump pyinstaller from 6.8.0 to 6.9.0

Bumps [pyinstaller](https://github.com/pyinstaller/pyinstaller) from 6.8.0 to 6.9.0.
- [Release notes](https://github.com/pyinstaller/pyinstaller/releases)
- [Changelog](https://github.com/pyinstaller/pyinstaller/blob/develop/doc/CHANGES.rst)
- [Commits](pyinstaller/pyinstaller@v6.8.0...v6.9.0)

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

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

Author: dependabot[bot]

requirements-dev.txt

@@ -1,5 +1,5 @@
 -r requirements.txt
 flake8==7.0.0
-pyinstaller==6.8.0
+pyinstaller==6.9.0
 pytest==8.2.2
 pytest-cov==5.0.0