Changed Model for Garage Shell

[Harley2787]

Wrong model causes infinite loading screen changed to the correct model which is: shell_garagem instead of shell_garagemed

Describe Pull request

If your PR is to fix an issue mention that issue here: The wrong model causes a infinite loading screen. To fix this I have ammended to code to the correct shell garage model

Questions (please complete the following information):

• Have you personally loaded this code into an updated qbcore project and checked all it's functionality? yes
• Does your code fit the style guidelines? yes
• Does your PR fit the contribution guidelines? yes