[SECURITY] Fedora 34 Update: python-PyMuPDF-1.18.8-2.fc34

This is PyMuPDF, a Python binding for MuPDF - a lightweight PDF and XPS viewer. MuPDF can access files in PDF, XPS, OpenXPS, epub, comic and ficti on book formats, and it is known for its top performance and high rendering quality. With PyMuPDF you therefore can also access files with extensions *.pdf, *.xps, *.oxps, *.epub, *.cbz or *.fb2 from your Python scripts.