Nit: tests fail after update to appstream 1.0.2

[vcunat]

Describe the bug After updating appstream from 1.0.1 to 1.0.2 meson test fails due to missing homepage :-)

==================================== 2/2 =====================================
test:         validate metainfo file
start time:   09:14:22
duration:     0.02s
result:       exit status 3
command:      ASAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1 MALLOC_PERTURB_=154 UBSAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1:print_stacktrace=1 /nix/store/820k815yafj6c7b3iqa2nl9qqs520ypc-appstream-1.0.2/bin/appstreamcli validate --no-net --pedantic /build/source/build/../data/io.github.feralinteractive.gamemode.metainfo.xml
----------------------------------- stdout -----------------------------------
I: io.github.feralinteractive.gamemode:6: summary-first-word-not-capitalized
I: io.github.feralinteractive.gamemode:7: developer-name-tag-deprecated
W: io.github.feralinteractive.gamemode:~: url-homepage-missing
I: io.github.feralinteractive.gamemode:~: developer-info-missing

✘ Validation failed: warnings: 1, infos: 3
==============================================================================


Summary of Failures:

2/2 validate metainfo file               FAIL            0.02s   exit status 3

Expected behavior Working tests.

System Info (please complete the following information):

• OS and version: NixOS, staging-next branch (soon to become nixos-unstable)
• GameMode Version: 1.8.1 (latest now)