fix: Check if folder is owned by administrators group (GitoxideLabs#1429)

The code had checked the process or thread's SID to see if it
matched the administrators group, but this will never be the case
since the process or thread is running as some user.

If the folder token is that of the administrators group, then at
that point we can check membership of the current thread SID in it.

Author: EliahKagan

gix-sec/src/identity.rs

@@ -187,12 +187,12 @@ mod impl_ {
             }
 
             // Admin-group owned folders are considered owned by the current user, if they are in the admin group
-            if IsWellKnownSid(token_owner, WinBuiltinAdministratorsSid) == 0 {
+            if IsWellKnownSid(folder_owner, WinBuiltinAdministratorsSid) == 0 {
                 return Ok(false);
             }
 
             let mut is_member = 0;
-            if CheckTokenMembership(0, token_owner, &mut is_member) == 0 {
+            if CheckTokenMembership(0, folder_owner, &mut is_member) == 0 {
                 error!("Couldn't check if user is an administrator");
             }