README: fix verification snippet (single-app API returns top-level object)

README.md

@@ -126,7 +126,7 @@ APP=4023ccbf-d57a-4500-97df-14de9cf3516e
 # 1. What is ACTUALLY running? (CLI update output is not evidence)
 curl -s -H "Authorization: Bearer $CLOUDRON_TOKEN" \
   https://my.inference.coop/api/v1/apps/$APP \
-  | python3 -c "import json,sys; print(json.load(sys.stdin)['app']['manifest']['dockerImage'])"
+  | python3 -c "import json,sys; print(json.load(sys.stdin)['manifest']['dockerImage'])"
 # 2. Container files match the repo (catches stale builder cache)
 cloudron --server my.inference.coop --token "$CLOUDRON_TOKEN" exec --app $APP \
   -- md5sum /app/code/librechat/client/dist/assets/custom.css