Bumping Markdig dependency

[IsaaacD]

Hello, I see Markdig is in Piranha.csproj but I'm wondering how I can update it?

I notice in 0.35.0 there is support for syntax like this that I would like to use in my Piranha CMS solutions [test](https://blah.org){#a-link .myclass data-lang=fr data-value="This is a value"} but that results in the curly brackets rendering as markup and not as attributes per here https://github.com/xoofx/markdig/blob/master/src/Markdig.Tests/Specs/GenericAttributesSpecs.md

I tried to manually add Markdig latest but I think I'd need to recompile Piranha when I'm just using the Nuget packages. Any help would be appreciated! Thanks

[IsaaacD]

So I ended up downloading the repo, bumping to 0.38.0 locally. I built the repo locally and included the dll in a path in project. I updated my .csproj as such, as Markdig wasn't found for some reason without it explicitly being specified.

   <ItemGroup>
        <PackageReference Include="Markdig" Version="0.38.0" />
        <Reference Include="./Services/DLL/Piranha.dll" />
	</ItemGroup>

I will note to get the syntax I wanted to use in my initial post, I updated DefaultMarkdown.cs line 21 to this:

    public MarkdownPipeline _pipeline { get; }= new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();