The default value of the contribution point needs to be displayed as a normal value

[yiliang114]

Reproduction steps:

1. Open https://vscode.dev/
2. Switch to the extension panel and search some extensions @builtin Emmet which have contribution points.
3. Find outliers displayed: [object Object]

Version: 1.83.1
Commit: f1b07bd
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36
Embedder: vscode.dev