broken build

[hfiguiere]

The current buid is broken following a push to master:

builddir/files/share/appdata/org.polymc.PolyMC.appdata.xml: FAILED:
• attribute-invalid     : <screenshot> width (578) did not match specified (976) [https://polymc.org/img/screenshots/LauncherDark.png]
• attribute-invalid     : <screenshot> height (452) did not match specified (764) [https://polymc.org/img/screenshots/LauncherDark.png]
• attribute-invalid     : <screenshot> width (555) did not match specified (931) [https://polymc.org/img/screenshots/LauncherCatDark.png]
• attribute-invalid     : <screenshot> height (452) did not match specified (759) [https://polymc.org/img/screenshots/LauncherCatDark.png]
• attribute-invalid     : <screenshot> width (667) did not match specified (1083) [https://polymc.org/img/screenshots/PropertiesDark.png]
• attribute-invalid     : <screenshot> height (452) did not match specified (735) [https://polymc.org/img/screenshots/PropertiesDark.png]
• attribute-invalid     : <screenshot> width (654) did not match specified (1000) [https://polymc.org/img/screenshots/ModInstallDark.png]
• attribute-invalid     : <screenshot> height (452) did not match specified (692) [https://polymc.org/img/screenshots/ModInstallDark.png]
• attribute-invalid     : <screenshot> width (490) did not match specified (930) [https://polymc.org/img/screenshots/ModUpdateDark.png]
• attribute-invalid     : <screenshot> height (452) did not match specified (858) [https://polymc.org/img/screenshots/ModUpdateDark.png]
• attribute-invalid     : <screenshot> width (523) did not match specified (1103) [https://polymc.org/img/screenshots/ModpackInstallDark.png]
• attribute-invalid     : <screenshot> height (452) did not match specified (954) [https://polymc.org/img/screenshots/ModpackInstallDark.png]
Validation of files failed

[d-513]

fixed with 2873e8b339ae752358f4385a8f7426455c6f3825 hopefully