chore(deps): update dependency pyinstaller to v6.19.0 (#500)

This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [pyinstaller](https://github.com/pyinstaller/pyinstaller) ([changelog](https://pyinstaller.org/en/stable/CHANGES.html)) | `==6.18.0` → `==6.19.0` | ![age](https://developer.mend.io/api/mc/badges/age/pypi/pyinstaller/6.19.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pyinstaller/6.18.0/6.19.0?slim=true) |

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### Release Notes

<details>
<summary>pyinstaller/pyinstaller (pyinstaller)</summary>

### [`v6.19.0`](https://github.com/pyinstaller/pyinstaller/releases/tag/v6.19.0)

[Compare Source](pyinstaller/pyinstaller@v6.18.0...v6.19.0)

Please see the [v6.19.0 section of the changelog](https://pyinstaller.org/en/v6.19.0/CHANGES.html#id1) for a list of the changes since v6.18.0.

</details>

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Reviewed-on: https://codeberg.org/umati/Sample-Server-asyncio/pulls/500
Co-authored-by: umati-bot <[email protected]>
Co-committed-by: umati-bot <[email protected]>

Author: umati-bot

requirements.txt

@@ -9,7 +9,7 @@ future==1.0.0
 importlib-metadata==8.7.1
 pefile==2024.8.26
 pycparser==3.0
-pyinstaller==6.18.0
+pyinstaller==6.19.0
 pyinstaller-hooks-contrib==2026.1
 python-dateutil==2.9.0.post0
 pytz==2025.2