chore: update oldest_items.json, change owner back to administrator

Signed-off-by: Ismail Arif <38789073+ismxilxrif@users.noreply.github.com>

erpnext/stock/dashboard_chart/oldest_items/oldest_items.json

@@ -15,7 +15,7 @@
  "module": "Stock",
  "name": "Oldest Items",
  "number_of_groups": 0,
- "owner": "rohitw1991@gmail.com",
+ "owner": "Administrator",
  "report_name": "Stock Ageing",
  "roles": [],
  "timeseries": 0,