Fix README: change`----hf_hub_log_args` to `--hf_hub_log_args` (#1776)

fix `----hf_hub_log_args` to `--hf_hub_log_args`

README.md

@@ -315,7 +315,7 @@ lm_eval --model hf \
     --tasks hellaswag \
     --log_samples \
     --output_path results \
-    ----hf_hub_log_args hub_results_org=EleutherAI,hub_repo_name=lm-eval-results,push_results_to_hub=True,push_samples_to_hub=True,public_repo=False \
+    --hf_hub_log_args hub_results_org=EleutherAI,hub_repo_name=lm-eval-results,push_results_to_hub=True,push_samples_to_hub=True,public_repo=False \
 ```
 
 For a full list of supported arguments, check out the [interface](https://github.com/EleutherAI/lm-evaluation-harness/blob/main/docs/interface.md) guide in our documentation!