[BUG] Sidebar Question Stats - Error if question is part of a collective

[double-beep]

If a question is part of a collective, (1, 2), the userscript fails to run:

Uncaught TypeError: Cannot read properties of null (reading 'textContent')
    at moveQuestionStats

Stack-Exchange-Userscripts/Sidebar-Question-Stats/StackSidebarQuestionStats.user.js

Line 55 in 80a4619

const cellLabel = cell.querySelector('span.fc-light').textContent;