Update benchmarking in README.md

Author: adam-maj

README.md

@@ -210,8 +210,8 @@ As a way to support quantifying the robustness of our system, we have added benc
 To run the benchmark:
 
 1. Run local server with `yarn dev`
-1. Set-up `.env.benchmark` (For sensible defaults: `cp .env.benchmark.example .env.benchmark`)
-1. Run benchmark in a separate terminal with `yarn benchmark`
+2. Set-up `.env.benchmark` (For sensible defaults: `cp .env.benchmark.example .env.benchmark`) - you'll need to update the `THIRDWEB_API_SECRET_KEY` at minimum.
+3. Run benchmark in a separate terminal with `yarn benchmark`
 
 ## Contributing