Make W3C validator happy

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Rebase commit 'web/download: remove developer repos and cleanup'

Commit cb17d7339c2a12d8bb36d3000f229d924e092d0c rebased

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Regenerate dist/

Signed-off-by: Timothy Gu <timothygu99@gmail.com>