Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: Latest
• OS Version: Browser

Steps to Reproduce:

1. Create a notebook file.
2. Create a code cell.
3. Click on "Select a language" in the cell hint "Select language, or fill with template ...".
   (Note: if the hint is not visible, please patch the fix: Fixed wrong negation in the _shouldRenderHint logic. #242479)
4. Choose a language.

Actual: Nothing happens.
Expected: Cell language is changed to the selected language.