Bump demo SHA to production SHA 9df523abf1a7f8aa83f90f47cd43da71c2e88806 (#616)

Co-authored-by: anna-parker <[email protected]>

Author: github-actions[bot]

deploy/demo/config.json

@@ -1,6 +1,6 @@
 {
   "branch": "demo",
   "special_environment": "demo",
-  "head_sha": "553488f787c497b476adcf7516ac8b7073ecc612",
+  "head_sha": "9df523abf1a7f8aa83f90f47cd43da71c2e88806",
   "host": "demo.pathoplexus.org"
 }