Relax version requirements for several PyQt6 components.

--- qt/pyproject.toml.orig	2025-07-05 14:16:12 UTC
+++ qt/pyproject.toml
@@ -45,11 +45,11 @@ qt = [
   "pyqt6_sip==13.10.2",
 ]
 qt = [
-  "pyqt6==6.8.0",
-  "pyqt6-qt6==6.8.1",
-  "pyqt6-webengine==6.8.0",
-  "pyqt6-webengine-qt6==6.8.1",
-  "pyqt6_sip==13.10.2",
+  "pyqt6",
+  "pyqt6-qt6",
+  "pyqt6-webengine",
+  "pyqt6-webengine-qt6",
+  "pyqt6_sip",
 ]
 
 [tool.uv]