bug#63308: [BUG] python-pikepdf build broken

[kiasoc5--- via Bug reports for GNU Guix]

The build is broken because qpdf in Guix is too old (inferring this from 
https://github.com/pikepdf/pikepdf/issues/497#issuecomment-1646312997)

Therefore a qpdf upgrade would be required, which would involve a patch 
to core-updates.