Bump Microsoft.Extensions.Configuration.Xml from 3.1.0 to 6.0.0 (#276)

Bumps [Microsoft.Extensions.Configuration.Xml](https://github.com/dotnet/runtime) from 3.1.0 to 6.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](https://github.com/dotnet/runtime/commits/v6.0.0)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Configuration.Xml
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/Lighthouse/Lighthouse.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Akka.Cluster.Hosting" Version="0.5.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Xml" Version="3.1.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Xml" Version="6.0.0" />
     <PackageReference Include="Petabridge.Cmd.Cluster" Version="$(PbmVersion)" />
     <PackageReference Include="Petabridge.Cmd.Remote" Version="$(PbmVersion)" />
     <PackageReference Include="Akka.Bootstrap.Docker">