ci: Checkout default branch in workflow

Improves pipeline performance by fetching only the default branch instead of the full repository history. Ensures consistency by always working from the canonical default branch.

Author: MuhammadZeshan382

.github/workflows/ci-cd-pipeline.yml

@@ -110,7 +110,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
         with:
-          fetch-depth: 0
+          ref: ${{ github.event.repository.default_branch }}
           token: ${{ github.token }}
 
       - name: Configure Git