Why does a project show "Updated 4 days ago" when it hasn't been updated for three months?

When I list my projects one of them, a private repo, is shown “Updated 4 days ago” but the last commit was 3 months ago. I am the only person who has access to this repo and I haven’t done anything like create a wiki page. What else can there be that’s causing it to show it as having been updated so recently ?

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