Update deployment script to fetch latest changes

Fetch latest changes from GitHub repository and update specific files.

.github/workflows/ghcr.yml

@@ -39,6 +39,9 @@ jobs:
         key: ${{ secrets.SERVER_SSH_KEY }}
         script: |
           cd /home/dilanka/my_website
+          git fetch https://${{ github.actor }}:${{ secrets.GHCR_PAT }}@github.com/DilankaHer/my_website.git main
+          git checkout FETCH_HEAD -- docker-compose.yml my_website.db
           docker pull ghcr.io/dilankaher/my_website:latest
           docker compose down
           docker compose up -d
+