fix: cache directory variable (#378)

Fixes cache directory bug by using HF_HUB_CACHE instead of HF_HOME

See documentation https://huggingface.co/docs/huggingface_hub/main/en/package_reference/environment_variables#hfhubcache

Author: NazimHAli

src/lighteval/utils/utils.py

@@ -192,7 +192,7 @@ class EnvConfig:
         token (str): authentication token used for accessing the HuggingFace Hub.
     """
 
-    cache_dir: str = os.getenv("HF_HOME", "/scratch")
+    cache_dir: str = os.getenv("HF_HUB_CACHE", "/scratch")
     token: str = os.getenv("HF_TOKEN")