Bump coverlet.collector from 6.0.2 to 6.0.4

---
updated-dependencies:
- dependency-name: coverlet.collector
  dependency-version: 6.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

test/AStar.Dev.Api.Usage.Sdk.Tests.Unit/AStar.Dev.Api.Usage.Sdk.Tests.Unit.csproj

@@ -8,7 +8,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="coverlet.collector" Version="6.0.2"/>
+        <PackageReference Include="coverlet.collector" Version="6.0.4"/>
         <PackageReference Include="JetBrains.Annotations" Version="2025.2.2"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0"/>
         <PackageReference Include="Shouldly" Version="4.3.0"/>