Refactor code to .NET8

WebAPI/dataProcessors/t1.r1.processor.cs

@@ -31,7 +31,7 @@ public class T1R1Processor
     {
         var year = int.Parse(processWorker.Records?.SingleOrDefault(x => x.Code == "Year")?.Desc1!);
         var sources = processWorker.Records?.Where(x => x.Code == "Source").ToList();
-        if (!sources!.Any())
+        if (sources!.Count == 0)
         {
             throw new Exception("Source record not found");
         }
@@ -71,7 +71,7 @@ public class T1R1Processor
 
         var dataSources = new List<Layer>();
 
-        foreach (var source in sources!)
+        foreach (var source in sources)
         {
             for (var month = 1; month <= DateTime.UtcNow.Month; month++)
             {