fixed the .net8 file copy breakage

Author: T-rav

source/StoneAge.Data.FileSystem.Tests/StoneAge.FileStore.Tests.csproj

@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <None Update="majestic_million.csv">
+    <None Include="majestic_million.csv">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
   </ItemGroup>