Update user_management.md link

user_management.md is moving under architecture/ as part of
https://gerrit.openbmc-project.xyz/c/openbmc/docs/+/26253/

26253 should merge before this is merged.

Change-Id: I4dcbb12b5ac39c225410bda7d9c15b51304b1290
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
2 files changed