Update ONBOARDING.md

Author: MitCode85

ONBOARDING.md

@@ -6,7 +6,7 @@ Welcome to the project! Here’s how to get your development environment set up
 
 Before you begin, make sure you have the following installed on your system:
 
-* **Python 3.9+**
+* **Python 3.11+**
 * **Git**
 * **ffmpeg** & **ffprobe**
 * **mp3gain** (optional, but recommended)
@@ -78,4 +78,5 @@ This project uses standard tools to maintain code quality.
     pre-commit install
     ```
 
-That's it! You're ready to start developing.
+
+That's it! You're ready to start developing.