fix typo

README.md

@@ -51,7 +51,7 @@ cd vllm
 git checkout 808a7b69df479b6b3a16181711cac7ca28a9b941
 VLLM_USE_PRECOMPILED=1 uv pip install --editable .
 ```
-Install addtional requirements for vllm-omni
+Install additional requirements for vllm-omni
 ```bash
 uv pip install -r requirements.txt
 ```