Fix install steps order in README (#133)

Author: VldmrB

README.md

@@ -43,13 +43,13 @@ Compute Platform version).
 
 ## How to
 
-Install dependencies, clone repo and run benchmark:
-
-    pip install -r requirements.txt
+Clone repo, install dependencies, and run benchmark:
 
     git clone https://github.com/turboderp/exllama
     cd exllama
 
+    pip install -r requirements.txt
+
     python test_benchmark_inference.py -d <path_to_model_files> -p -ppl
 
 The CUDA extension is loaded at runtime so there's no need to install it separately. It will be compiled on the first