Bump demo SHA to production SHA 553488f787c497b476adcf7516ac8b7073ecc612 (#613)

Co-authored-by: corneliusroemer <[email protected]>

Author: github-actions[bot]

deploy/demo/config.json

@@ -1,6 +1,6 @@
 {
   "branch": "demo",
   "special_environment": "demo",
-  "head_sha": "720af79904b5f69d8a7e558e6d175505c48452cb",
+  "head_sha": "553488f787c497b476adcf7516ac8b7073ecc612",
   "host": "demo.pathoplexus.org"
 }