fix typo (#2018)

Author: Lynsoo

README.md

@@ -184,7 +184,7 @@ Use the command line interface to run advanced workflows such as pretraining or
 After installing LitGPT, select the model and workflow to run (finetune, pretrain, evaluate, deploy, etc...):
 
 ```bash
-# ligpt [action] [model]
+# litgpt [action] [model]
 litgpt  serve     meta-llama/Llama-3.2-3B-Instruct
 litgpt  finetune  meta-llama/Llama-3.2-3B-Instruct
 litgpt  pretrain  meta-llama/Llama-3.2-3B-Instruct