Bump demo SHA to production SHA a7fde10fe9d8b961809b423e3ba91ee0c2392f1e (#768)

Co-authored-by: theosanderson <19732295+theosanderson@users.noreply.github.com>

Author: github-actions[bot]

deploy/demo/config.json

@@ -1,6 +1,6 @@
 {
   "branch": "demo",
   "special_environment": "demo",
-  "head_sha": "7118151a12a4326217ef66b30da111d38e9ee020",
+  "head_sha": "a7fde10fe9d8b961809b423e3ba91ee0c2392f1e",
   "host": "demo.pathoplexus.org"
 }