Bump coverlet.msbuild from 6.0.2 to 6.0.3 (#815)

Bumps [coverlet.msbuild](https://github.com/coverlet-coverage/coverlet) from 6.0.2 to 6.0.3.
- [Release notes](https://github.com/coverlet-coverage/coverlet/releases)
- [Commits](coverlet-coverage/coverlet@v6.0.2...v6.0.3)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Directory.Packages.props

@@ -4,7 +4,7 @@
     <GlobalPackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.556" PrivateAssets="All" />
   </ItemGroup>
   <ItemGroup>
-    <PackageVersion Include="coverlet.msbuild" Version="6.0.2" />
+    <PackageVersion Include="coverlet.msbuild" Version="6.0.3" />
     <PackageVersion Include="GitHubActionsTestLogger" Version="2.4.1" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Logging" Version="8.0.1" />