Update CI script to use new directory path

Revised the `cd` command in the CI pipeline script to navigate
to `/home/ubuntu/projects/gym-app/GymMgmt`. This replaces the
previous conditional paths (`/home/ubuntu/gym-app` or
`/root/gym-app`) with a specific and updated directory structure.
Ensures the script operates in the correct application directory.

Author: HamzaZeroual2

.github/workflows/ci.yml

@@ -87,7 +87,7 @@ jobs:
             set -e
 
             # 1. Navigate to your app folder (adjust path if needed)
-            cd /home/ubuntu/gym-app || cd /root/gym-app
+            cd /home/ubuntu/projects/gym-app/GymMgmt
             
             # 2. Pull the latest code
             echo "⬇️ Pulling latest code..."