access-control: increment user cache generation when saving acl config

since `CachedUserInfo` takes care of both, the user config and the acl
config, we need to also bump the cache generation when storing the
acl config.

Signed-off-by: Shannon Sterz <s.sterz@proxmox.com>

proxmox-access-control/src/acl.rs

@@ -641,6 +641,9 @@ pub fn save_config(acl: &AclTree) -> Result<(), Error> {
     let conf = acl_config();
     replace_privileged_config(conf, &raw)?;
 
+    // increase cache generation so we reload it next time we access it
+    access_conf().increment_cache_generation()?;
+
     Ok(())
 }