Update README.md

Author: cte

benchmark/README.md

@@ -1,12 +1,19 @@
-# Benchmark Harness
+# Run Roo Code Evals
 
 ## Get Started
 
-Clone the Roo Code repo and run the setup script:
+NOTE: This is MacOS only for now!
+
+Clone the Roo Code repo:
 
 ```sh
 git clone https://github.com/RooVetGit/Roo-Code.git
 cd Roo-Code
+```
+
+Run the setup script:
+
+```sh
 git checkout cte/benchmark-monorepo
 cd benchmark
 ./scripts/setup.sh