Update Linguini to 0.6

[Mailaender]

https://github.com/Ygg01/Linguini/releases/tag/v0.6.0

[pchote]

From the changelog:

moves the project to Net6.0 because current version of dotnet causes problems with the pipelines. Because some downstream are on Net 4.7.6, this might break if left as a minor version update.

Does this silently break the mono build?

[Mailaender]

Still works with @mono in a local test.

[PunkPun]

Changelog