Show extension download counts with thousands separators (#12857)

This PR adjusts the extension download counts to be displayed using
thousands separators.

Release Notes:

- Adjusted extension download counts to display with thousands
separators (e.g., `1,000,000`).
57c40299a5Marshall Bowers committed on 6/10/2024, 6:19:17 PM· committed by GitHubparent0d5485b
4 files changedLine totals unavailable