Fix a broken link for the bcrypt ref. at the web-config.yml example

Signed-off-by: Gezim Sejdiu <g.sejdiu@gmail.com>

documentation/examples/web-config.yml

@@ -6,7 +6,7 @@ tls_server_config:
   key_file: server.key
 
 # Usernames and passwords required to connect to Prometheus.
-# Passwords are hashed with bcrypt: https://github.com/prometheus/exporter-toolkit/blob/master/https/README.md#about-bcrypt
+# Passwords are hashed with bcrypt: https://github.com/prometheus/exporter-toolkit/blob/master/docs/web-configuration.md#about-bcrypt
 basic_auth_users:
   alice: $2y$10$mDwo.lAisC94iLAyP81MCesa29IzH37oigHC/42V2pdJlUprsJPze
   bob: $2y$10$hLqFl9jSjoAAy95Z/zw8Ye8wkdMBM8c5Bn1ptYqP/AXyV0.oy0S8m