chore(deps): bump pyinstaller from 6.14.2 to 6.15.0 in /requirements (#8207)

Bumps [pyinstaller](https://github.com/pyinstaller/pyinstaller) from 6.14.2 to 6.15.0.
- [Release notes](https://github.com/pyinstaller/pyinstaller/releases)
- [Changelog](https://github.com/pyinstaller/pyinstaller/blob/develop/doc/CHANGES.rst)
- [Commits](pyinstaller/pyinstaller@v6.14.2...v6.15.0)

---
updated-dependencies:
- dependency-name: pyinstaller
  dependency-version: 6.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: seshubaws <116689586+seshubaws@users.noreply.github.com>
Co-authored-by: vicheey <181402101+vicheey@users.noreply.github.com>

Author: 3 people

requirements/pyinstaller-build.txt

@@ -1,3 +1,3 @@
 # Executable binary builder requirements
 setuptools==80.9.0
-pyinstaller==6.14.2
+pyinstaller==6.15.0