use is null

Author: mauroservienti

src/ServiceControl.Persistence.RavenDB/MemoryInformationRetriever.cs

@@ -31,7 +31,7 @@ record MemoryInformation
         var httpResponse = await client.GetAsync("/admin/debug/memory/stats?includeThreads=false&includeMappings=false", cancellationToken);
         var responseDto = JsonSerializer.Deserialize<ResponseDto>(await httpResponse.Content.ReadAsStringAsync(cancellationToken));
 
-        return null == responseDto.MemoryInformation
+        return responseDto.MemoryInformation is null
             ? default
             : (responseDto.MemoryInformation.IsHighDirty, responseDto.MemoryInformation.DirtyMemory);
     }