reload on change not working

Building Middleware lab

step 14. You can modify configuration files to automatically reload when they are changed by setting reloadOnChange to true. You can also specify whether they should be required or optional:

`.AddJsonFile("config.json", optional: false, reloadOnChange: true)`

Start with the Building Middleware lab, specifically step 14 and its AddJsonFile configuration example. Reproduce the reported behavior by changing config.json and check whether reloadOnChange takes effect; done means configuration changes reload as described without requiring a restart.

Written by the indexing model from the issue text.