feat(github-cd-demo): update stage

Author: mathis-lorenzo

.github/workflows/deploy.yaml

@@ -36,6 +36,7 @@ jobs:
   Deploy_frontend:
     runs-on: ubuntu-latest
     env:
+      STAGE: mathis-demo
       AWS_DEFAULT_REGION: us-west-2
     steps:
       - uses: actions/checkout@v4
@@ -50,3 +51,5 @@ jobs:
           role-to-assume: arn:aws:iam::576872909007:role/trackflix-live-oidc-mathis-Role-Mjk10LZ9m8X9
       - run: npm ci
       - run: npx nx run webui:upload
+
+# feat(github-cd-demo): update permissions