Update deploy.yaml: mode=staging

Author: lionello

.github/workflows/deploy.yaml

@@ -53,7 +53,7 @@ jobs:
         uses: DefangLabs/[email protected]
         with:
           config-env-vars: ASK_TOKEN OPENAI_API_KEY REBUILD_TOKEN SECRET_KEY SEGMENT_WRITE_KEY DISCORD_APP_ID DISCORD_TOKEN DISCORD_PUBLIC_KEY
-          mode: production
+          mode: staging
           provider: aws
 
         env: