[Dokka 2] References from a module description to module's classes are no longer rendered as links

[fzhinkin]

Describe the bug

After updating DGP to 2.0.0-Beta, references from a markdown document describing a module to classes/functions from that module are no longer rendered as HTML links in resulting documentation.

Expected behaviour
References to classes are rendered as links to corresponding classes documentation.

Screenshots

To Reproduce
Checkout dgp-2.0 branch from kotlinx.coroutines and run ./gradlew dokkaGenerate.

Check Kotlin/kotlinx.coroutines#4257 for detailed configuration.
The same issue is also reproducible with kotlinx-io after updating the Dokka.

[whyoleg]

kotlinx-io PR: Kotlin/kotlinx-io#410

Let's recheck after #3814 is merged - I have a good feeling it could be related