build(deps): bump coverlet.msbuild from 3.2.0 to 6.0.0 in /src

Bumps [coverlet.msbuild](https://github.com/coverlet-coverage/coverlet) from 3.2.0 to 6.0.0.
- [Release notes](https://github.com/coverlet-coverage/coverlet/releases)
- [Commits](coverlet-coverage/coverlet@v3.2.0...v6.0.0)

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

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

src/Akavache.Tests/Akavache.Tests.csproj

@@ -21,7 +21,7 @@
     <PackageReference Include="FluentAssertions" Version="6.10.0" />
     <PackageReference Include="DiffEngine" Version="11.4.0" />
     <PackageReference Include="PublicApiGenerator" Version="11.0.0" />
-    <PackageReference Include="coverlet.msbuild" Version="3.2.0">
+    <PackageReference Include="coverlet.msbuild" Version="6.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>