⬆️ Update pyqt6 requirement in the python-dependencies group

Updates the requirements on [pyqt6](https://www.riverbankcomputing.com/software/pyqt/) to permit the latest version.

Updates `pyqt6` to 6.7.0

---
updated-dependencies:
- dependency-name: pyqt6
  dependency-type: direct:production
  dependency-group: python-dependencies
...

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

pyproject.toml

@@ -34,7 +34,7 @@ classifiers = [
 ]
 requires-python = ">=3.8"
 dependencies = [
-    "PyQt6>=6.2.3,<6.7.0"
+    "PyQt6>=6.2.3,<6.8.0"
 ]
 dynamic = ["version"]