This fixes the build, which was previously failing with:
In file included from /build/source/build/libappletdecoration/appletdecorationplugin_autogen/EWIEGA46WW/moc_previewbridge.cpp:10,
from /build/source/build/libappletdecoration/appletdecorationplugin_autogen/mocs_compilation.cpp:9:
/build/source/build/libappletdecoration/appletdecorationplugin_autogen/EWIEGA46WW/../../../../libappletdecoration/previewbridge.h:53:10: error: 'void Decoration::Applet::PreviewBridge::update(KDecoration2::Decoration*, const QRect&)' marked 'override', but does not override
53 | void update(KDecoration2::Decoration *decoration, const QRect &geometry) override;
| ^~~~~~
