Update macOS CI

try to workaround stupid GitHub Actions... sleep before creating dmg, may work(?)

Author: rodlie

src/scripts/build_mac.sh

@@ -84,4 +84,5 @@ rm -f src/app/Friction.app/Contents/Frameworks/{libQt5MultimediaWidgets.5.dylib,
 rm -rf src/app/Friction.app/Contents/PlugIns/{bearer,iconengines,imageformats,mediaservice,printsupport,styles}
 
 mkdir dmg && mv src/app/Friction.app dmg/
+sleep 10
 hdiutil create -volname "Friction" -srcfolder dmg -ov -format ULMO Friction-${VERSION}-${CPU}.dmg

src/scripts/build_mac_universal.sh

@@ -66,4 +66,5 @@ plutil -insert LSArchitecturePriority.0 -string arm64 ${PLIST}
 plutil -insert LSArchitecturePriority.1 -string x86_64 ${PLIST}
 
 mkdir dmg && mv Friction.app dmg/
+sleep 10
 hdiutil create -volname "Friction" -srcfolder dmg -ov -format ULMO Friction-${VERSION}.dmg