A useful caveat for interpreting this spike: Hub downloads are file-request counts, not a count of unique users. GET and HEAD requests to the counted files both contribute. For GGUF, every .gguf file is counted, so cloning a repository with several quantizations can add several downloads.
That does not establish what caused this particular spike, but it means the reported total and likes/community activity are different signals. The official counting rules are here: https://huggingface.co/docs/hub/models-download-stats#how-are-gguf-files-handled