I think this should fix the issue. Just need to run script to update elements.d.ts

Just need to run script to update

I ran both and added the changes to this branch

@patricklx Thanks! This seems to fix most namespace cases within svg!

The xlmns attribute is still yelled at with glint 1.4.1-unstable.6e222ff:

<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'> 
  <path d='M16.32 14.9l5.39 5.4a1 1 0 0 1-1.42 1.4l-5.38-5.38a8 8 0 1 1 1.41-1.41zM10 16a6 6 0 1 0 0-12 6 6 0 0 0 0 12z' />
</svg>

Even though xmlns is not required, it should be allowed by glint, or? Edit: When thinking about it more, yelling at unnecessary xmlns may be a good feature to have delegated to glint after all. (not sure though).