fix: Add "--security-opt"

[Tiryoh]

VNC blackouts without "--security-opt" option on Ubuntu

-docker run -p 6080:80 --shm-size=512m tiryoh/ros2-desktop-vnc:humble
+docker run -p 6080:80 --security-opt seccomp=unconfined --shm-size=512m tiryoh/ros2-desktop-vnc:humble

before

after

• related issues
  • https://github.com/Tiryoh/docker-ros2-desktop-vnc/pull/56
  • https://github.com/Tiryoh/docker-ros2-desktop-vnc/issues/85
  • https://github.com/mviereck/x11docker/issues/346
• related info
  • https://blog.jp.square-enix.com/iteng-blog/posts/00016-wsl2-gui-seccomp-issue/