Bug#1091092: Incorrect dependency on malcontent-gui

[asciiwolf at seznam.cz]

Maybe the root of the blank Apps tab problem could be related to the following issue and a proposed fix?

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991440
https://salsa.debian.org/freedesktop-team/malcontent/-/merge_requests/3

(Although this seems to be about libmalcontent vs malcontent, not malcontent-gui.)