Bump pyinstaller from 6.20.0 to 6.21.0

Bumps [pyinstaller](https://github.com/pyinstaller/pyinstaller) from 6.20.0 to 6.21.0.
- [Release notes](https://github.com/pyinstaller/pyinstaller/releases)
- [Changelog](https://github.com/pyinstaller/pyinstaller/blob/develop/doc/CHANGES.rst)
- [Commits](pyinstaller/pyinstaller@v6.20.0...v6.21.0)

---
updated-dependencies:
- dependency-name: pyinstaller
  dependency-version: 6.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -62,7 +62,7 @@ responses = ">=0.23.1,<0.27.0"
 pyfakefs = ">=5.7.2,<5.11.0"
 
 [tool.poetry.group.executable.dependencies]
-pyinstaller = {version=">=6.20.0,<7.0.0", python=">=3.9,<3.15"}
+pyinstaller = {version=">=6.21.0,<7.0.0", python=">=3.9,<3.15"}
 dunamai = ">=1.26.1,<1.27.0"
 
 [tool.poetry.group.dev.dependencies]