Fix reading model info in get_adapter_info() for HF (#695)

The config key on HF side has not changed from `adapter_transformers`.
Thus, currently the model name is never returned correctly for HF
adapters.

This is required to fix the HF hub inference widgets.

src/adapters/utils.py

@@ -815,7 +815,9 @@ def get_adapter_info(adapter_id: str, source: str = "ah") -> Optional[AdapterInf
             return AdapterInfo(
                 source="hf",
                 adapter_id=model_info.modelId,
-                model_name=model_info.config.get("adapters", {}).get("model_name") if model_info.config else None,
+                model_name=model_info.config.get("adapter_transformers", {}).get("model_name")
+                if model_info.config
+                else None,
                 username=model_info.modelId.split("/")[0],
                 sha1_checksum=model_info.sha,
             )