Update pyqt5 requirement from ~=5.15.6 to ~=5.15.10 in /fdml-gui

Updates the requirements on [pyqt5](https://www.riverbankcomputing.com/software/pyqt/) to permit the latest version.

---
updated-dependencies:
- dependency-name: pyqt5
  dependency-type: direct:production
...

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

fdml-gui/requirements.txt

@@ -1,2 +1,2 @@
 numpy~=1.22.0
-pyqt5~=5.15.6
+pyqt5~=5.15.10