Update altCLIP model card (#38306)
* Update altclip.md
* Update altclip.md
* Update altclip.md
* Update altclip.md
* Update altclip.md
* Update altclip.md
* Rename altclip.md to altclip.mdx
* Rename altclip.mdx to altclip.md
* Update altclip.md
* Update altclip.md
* Update altclip.md
---------
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>