Pin Coverlet.collector to 6.0.4

Coverlet.collector 8+ requires .NET 8+
See coverlet-coverage/coverlet#1842

Author: jnyrup

Tests/FluentAssertions.DataSets.Specs/FluentAssertions.DataSets.Specs.csproj

@@ -20,7 +20,7 @@
   <ItemGroup>
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />
-    <PackageReference Include="coverlet.collector" Version="6.0.4" PrivateAssets="all">
+    <PackageReference Include="coverlet.collector" Version="[6.0.4]" PrivateAssets="all">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
   </ItemGroup>