[BUG] Wrong environment variable used for cache directory

[NazimHAli]

Describe the bug

The env config is using the wrong environment variable to get the cache directory. This leads to duplicate model/asset downloads.

To Reproduce

The cache_dir value uses HF_HOME environment variable

Expected behavior

Uses HF_HUB_CACHE environment variable

Version info

github main

[clefourrier]

Good catch! Let's update this!