Upgrade project(s) to the SDK-style project format

[github-actions]

There are 2 project(s) using the non-SDK-style project format. This is an auto-generated issue, detailed and discussed in dotnet/docs#22271.

• non-lts/project.json
• non-lts/ReallyOld.xproj

Consider upgrading the project(s) to the SDK-style format.

If this project is intentionally demonstrating the old project style, you can optionally configure to ignore this automated issue. Create a file at the root of the repository, named dotnet-versionsweeper.json and add an ignore entry following the globbing patterns detailed here.

{
    "ignore": [
        "**/path/to/example.csproj"
    ]
}