Add conditions to use only the schedule event

.github/workflows/demo.yml

@@ -17,6 +17,7 @@ env:
 jobs:
     build-and-push-image-lecoffre:
         runs-on: ubuntu-latest
+        if: ${{ github.event_name == 'schedule' && github.ref == 'refs/heads/legacy_dev' }}
         steps:
             - uses: actions/checkout@v4
             - name: Setup SSH
@@ -42,7 +43,8 @@ jobs:
     deploy-to-scaleway-lecoffre:
         needs: build-and-push-image-lecoffre
         runs-on: ubuntu-latest
-        environment: staging
+        environment: demo
+        if: ${{ github.event_name == 'schedule' && github.ref == 'refs/heads/legacy_dev' }}
         steps:
             - name: Install CLI
               uses: scaleway/action-scw@v0