Bump System.Linq.Dynamic.Core from 1.4.6 to 1.4.7 in /docs/csharp/linq/snippets/HowToBuildDynamicQueries in the dotnet group

Bump System.Linq.Dynamic.Core from 1.4.6 to 1.4.7 in /docs/csharp/linq/snippets/HowToBuildDynamicQueries in the dotnet group #6935