Bump pyqt6 from 6.3.1 to 6.4.0

Bumps [pyqt6](https://www.riverbankcomputing.com/software/pyqt/) from 6.3.1 to 6.4.0.

---
updated-dependencies:
- dependency-name: pyqt6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -1,4 +1,4 @@
 requests==2.28.1
 websocket-client==1.4.1
-pyqt6==6.3.1
+pyqt6==6.4.0
 python-dateutil==2.8.2