build(deps): Bump pyinstaller from 4.8 to 4.9

Bumps [pyinstaller](https://github.com/pyinstaller/pyinstaller) from 4.8 to 4.9.
- [Release notes](https://github.com/pyinstaller/pyinstaller/releases)
- [Changelog](https://github.com/pyinstaller/pyinstaller/blob/v4.9/doc/CHANGES.rst)
- [Commits](pyinstaller/pyinstaller@v4.8...v4.9)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

scripts/build-requirements.txt

@@ -1 +1 @@
-PyInstaller==4.8
+PyInstaller==4.9