Fix cicd to use schedule event

.github/workflows/demo.yml

@@ -1,8 +1,8 @@
 name: Demo - Build & Deploy to Scaleway
 
 on:
-    push:
-        branches: [legacy_dev]
+    schedule:
+        - cron: '48 13 * * *' # 13:48 UTC -> 15:48 CEST
 
 env:
     PROJECT_ID_LECOFFRE: 72d08499-37c2-412b-877e-f8af0471654a
@@ -17,6 +17,8 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - uses: actions/checkout@v4
+              with:
+                ref: cicd
             - name: Setup SSH
               run: |
                   mkdir -p ~/.ssh
@@ -40,7 +42,7 @@ jobs:
     deploy-to-scaleway-lecoffre:
         needs: build-and-push-image-lecoffre
         runs-on: ubuntu-latest
-        environment: staging
+        environment: demo
         steps:
             - name: Install CLI
               uses: scaleway/action-scw@v0