PR #3747 renamed the option wayland.windowManager.sway.systemdIntegration to wayland.windowManager.sway.systemd.enable. This commit simply updates documentation to reference the new format.
We do this by adding QT_QPA_PLATFORM=xcb to the service environment as per the workaround given in https://copyq.readthedocs.io/en/latest/known-issues.html#known-issue-wayland Fixes #3530