[3dprinter-general] Bug#975665: slic3r-prusa: FTBFS against boost_1.74

[Tobias Frost]

Package: slic3r-prusa
Followup-For: Bug #975665
Control: tags -1 fixed-upstream
Control: forwarded -1 https://github.com/prusa3d/PrusaSlicer/issues/4264

Well, OpenSuse released the new upstream version, which fixed the boost problem,
and the link above stopped working afterwards.

Updating meta-data to point to the prusa PR.

Cheers,
tobi