Update generate_preview_link.yml

Author: balakrishna-deriv

.github/workflows/generate_preview_link.yml

@@ -55,7 +55,7 @@ jobs:
                   path: flutter-chart
                   ref: ${{github.head_ref}}
                   alternate_repository: 'regentmarkets/flutter-chart'
-                  alternate_ref: fe-changes
+                  alternate_ref: dev
                   token: ${{ secrets.REPO_READ_TOKEN }}
 
           - uses: subosito/flutter-action@62f096cacda5168a3bd7b95793373be14fa4fbaf