Concat on string property Error

I am migrating a Test Project From EF Core 7.0.4 to 8.0.1
I have some tests that using 7.0.4 work, with 8.0.1 fail

the simplest query that reproduce is this :

```
db.Set().Select(itm=>itm.CityName.Concat("- A string")).ToArray();

public class City
{
public Guid CityID { get; set; }
public string CityName { get; set; }
}

```
the provider is SqlServer

the project at https://github.com/GLuca74/EFConcat reproduce the problem

the message is :

```
System.InvalidOperationException
HResult=0x80131509
Messaggio=The LINQ expression '[-, ,A, ,s,t,r,i,n,g]' could not be translated. Either rewrite the query in a form that can be translated, or switch to client evaluation explicitly by inserting a call to 'AsEnumerable', 'AsAsyncEnumerable', 'ToList', or 'ToListAsync'. See https://go.microsoft.com/fwlink/?linkid=2101038 for more information.
Origine=Microsoft.EntityFrameworkCore.Relational
Analisi dello stack:
in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.VisitExtension(Expression extensionExpression)
in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.Visit(Expression expression)
in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.Visit(Expression expression)
in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.Translate(SelectExpression selectExpression, Expression expression)
in Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslatingExpressionVisitor.TranslateSelect(ShapedQueryExpression source, LambdaExpression selector)
in Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
in Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
in Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.Translate(Expression expression)
in Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslatingExpressionVisitor.Translate(Expression expression)
in Microsoft.EntityFrameworkCore.Query.QueryCompilationContext.CreateQueryExecutor[TResult](Expression query)
in Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery[TResult](Expression query, Boolean async)
in Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](IDatabase database, Expression query, IModel model, Boolean async)
in Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass9_0`1.b__0()
in Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func`1 compiler)
in Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
in Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression)
in Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable`1.GetEnumerator()
in System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
in System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source)
in EFConcat.Program.Main(String[] args) in D:\VM\EFConcat\Program.cs: riga 17

```

Can you please check?
Thank you