COMP: Update PythonQt to relax minimum required Qt version for Ubuntu 24.04

This updates the PythonQt revision to relax the minimum required Qt version,
ensuring compatibility with Ubuntu 24.04.

List of PythonQt changes:

```
$ git shortlog 4869cbe5..805e3c09 --no-merges
Jean-Christophe Fillion-Robin (1):
      [commontk] cmake: Relax minimum required Qt version to support Ubuntu 24.04

```

Author: jcfr

CMakeExternals/PythonQt.cmake

@@ -91,7 +91,7 @@ if(NOT DEFINED PYTHONQT_INSTALL_DIR)
 
   ctkFunctionExtractOptimizedLibrary(PYTHON_LIBRARIES PYTHON_LIBRARY)
 
-  set(revision_tag 4869cbe540e383c8e25c8796269442d7865653f8) # patched-v3.6.1-2025-09-30-f4769f190
+  set(revision_tag 805e3c099b42c6198ffa4e43915245584e35dc62) # patched-v3.6.1-2025-09-30-f4769f190
   if(${proj}_REVISION_TAG)
     set(revision_tag ${${proj}_REVISION_TAG})
   endif()