Updating Qt version in RViz-Custom-Display tutorial

[dheerubhai-101]

Description

For ros-lyrical, when building a custom RViz display as per documentation, it leads to CMake error

Finished <<< rviz_plugin_tutorial_msgs [4.18s]                    
Starting >>> rviz_plugin_tutorial
--- stderr: rviz_plugin_tutorial                         
CMake Error at CMakeLists.txt:25 (qt5_wrap_cpp):
  Unknown CMake command "qt5_wrap_cpp".


---
Failed   <<< rviz_plugin_tutorial [1.68s, exited with code 1]

As Qt6 is the default for ros-lyrical, "qt5_wrap_cpp" is changed to "qt6_wrap_cpp" after which it builds successfully.

Fixes ros2/lyrical_tutorial_party#2737

Did you use Generative AI?

No

Additional Information

NA