fix type checking for missing key in dict

The dict key `enablerepos` has been replaced in a
previous PR and some occurrences have been
forgotten. The new key is now `repositories`.
Related to commit da07780
(tools/update: add a typed inventory)

Signed-off-by: Olivier Hoareau <olivier.hoareau@vates.tech>

Author: olivierh-pro

lib/tools/tasks/update.py

@@ -36,13 +36,13 @@ def update_pools(inventory: Inventory) -> None:
 
     with ThreadPoolExecutor() as executor:
         for p in pools:
-            executor.submit(p.master.update, inventory_hosts[p.master.hostname_or_ip]["enablerepos"])
+            executor.submit(p.master.update, inventory_hosts[p.master.hostname_or_ip]["repositories"])
 
     # secondary hosts
     with ThreadPoolExecutor() as executor:
         for p in pools:
             # omit first item because it is a primary (master)
             for secondary in p.hosts[1:]:
                 # repos are the same as the primary (master)
-                repos = inventory_hosts[p.master.hostname_or_ip]["enablerepos"]
+                repos = inventory_hosts[p.master.hostname_or_ip]["repositories"]
                 executor.submit(secondary.update, repos)