fix: npm run format:fix in root (#268)

stupid minor. unless you have main branch push setup to fix this
yourself, here you go

Latest commit is failing the format step in repo root

https://github.com/openai/codex/actions/runs/14524272942/job/40752229698

README.md

@@ -70,9 +70,11 @@ export OPENAI_API_KEY="your-api-key-here"
 > **Note:** This command sets the key only for your current terminal session. To make it permanent, add the `export` line to your shell's configuration file (e.g., `~/.zshrc`).
 >
 > **Tip:** You can also place your API key into a `.env` file at the root of your project:
+>
 > ```env
 > OPENAI_API_KEY=your-api-key-here
 > ```
+>
 > The CLI will automatically load variables from `.env` (via `dotenv/config`).
 
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