Fix typo in language-modeling README.md (#8287)

examples/language-modeling/README.md

@@ -68,13 +68,13 @@ python run_mlm.py \
 To run on your own training and validation files, use the following command:
 
 ```bash
-python run_clm.py \
+python run_mlm.py \
     --model_name_or_path roberta-base \
     --train_file path_to_train_file \
     --validation_file path_to_validation_file \
     --do_train \
     --do_eval \
-    --output_dir /tmp/test-clm
+    --output_dir /tmp/test-mlm
 ```
 
 If your dataset is organized with one sample per line, you can use the `--line_by_line` flag (otherwise the script