Bump coverlet.collector in /src/backend in the coverlet group

Bumps the coverlet group in /src/backend with 1 update: [coverlet.collector](https://github.com/coverlet-coverage/coverlet).


Updates `coverlet.collector` from 6.0.0 to 6.0.2
- [Release notes](https://github.com/coverlet-coverage/coverlet/releases)
- [Commits](coverlet-coverage/coverlet@v6.0.0...v6.0.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

tests/backend/WebApi.Tests/WebApi.Tests.csproj

@@ -6,7 +6,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="coverlet.collector" Version="6.0.0" />
+        <PackageReference Include="coverlet.collector" Version="6.0.2" />
         <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.7" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
         <PackageReference Include="Moq" Version="4.20.72" />