bank landing: show auto-account created datetime

API returns created; landing displays it once.

scripts/taler-bank/demo-withdraw-api.py

@@ -216,10 +216,10 @@ def create_personal_account() -> dict:
         "hint": (
             "This bank account was created for you automatically "
             f"(funny name: {name}). "
-            "Copy username and password now — we do not store them for later recovery. "
-            "Balance starts at GOA:0."
+            "Copy username and password now — we do not store them for later recovery."
         ),
         "created": time.strftime("%Y-%m-%dT%H:%MZ", time.gmtime()),
+        "created_human": time.strftime("%Y-%m-%d %H:%M %Z", time.localtime()),
     }