Clangd 21.1.0 has been out for a while now, but my VS Code extension doesn't download it. I'm using 20.1.8 currently.
If I invoke "Check for language server update", I get this:

If I invoke "Download language server", I get this:

If I then pick "Delete it and reinstall", I get this progress:

and eventually this result:

After that, the installed version is still 20.1.8.
System information
Clangd version: 20.1.8
clangd extension version: 0.2.0
Operating system: macOS 15.6.1