Unclear migration with respect to removal of `Language.LSP.Server.setupLogger`

We were using this action in `dhall-lsp-server`

```
-- | The main entry point for the LSP server.
run :: Maybe FilePath -> IO ()
run mlog = do
setupLogger mlog
...
```

What's the correct response to the removal? The changelog doesn't mention this.

Start with the dhall-lsp-server run entry point shown in the issue and compare its setupLogger call with the lsp changelog and the current Language.LSP.Server API. Confirm the intended migration, then document the replacement or required response and add the missing changelog guidance; done means users can migrate without guessing.

Written by the indexing model from the issue text.