Fix formatting in README for scan command

Author: P4o1o

README.md

@@ -111,9 +111,9 @@ To generate fix suggestions in the Markdown report, you need an OpenAI API key.
     OPENAI_API_KEY=sk-YourActualOpenAIKeyHere
     ```
 3.  Run the scan with the report flag:
-    ```bash
+```bash
 vibesafe scan -r ai-report.md
-    ```
+```
 
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