docs: add step to copy config

README.md

@@ -92,6 +92,7 @@ GitHub account). Unzip it, and run `main.exe`
 git clone https://github.com/WorldObservationLog/AppleMusicDecrypt.git
 cd AppleMusicDecrypt
 poetry install
+cp config.example.toml config.toml
 poetry run python main.py
 ```
 
@@ -114,4 +115,4 @@ poetry run python main.py
 1. Run the script, type command `mitm`
 2. Start Proxifier
 3. Start Apple Music Windows and play a song or an album.
-4. Now the script should catch the m3u8 link and start ripping
+4. Now the script should catch the m3u8 link and start ripping