[release/9.0.1xx-sr12] Fix ProjectList not displaying due to missing BindingContext update in template sample#31954

PureWeen merged 2 commits intorelease/9.0.1xx-sr12dotnet/maui:release/9.0.1xx-sr12from

backport/pr-31743-to-release/9.0.1xx-sr12dotnet/maui:backport/pr-31743-to-release/9.0.1xx-sr12Copy head branch name to clipboard