user-management: update doc URL

The doc URL changed in the document repository as of
    I97d3360a0c5b15b2935a69c9a1537acd17b05b55

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I5f078fa6e5e62e8ce56cc28c08d2d552d0fb3208
diff --git a/xyz/openbmc_project/User/PrivilegeMapperEntry.interface.yaml b/xyz/openbmc_project/User/PrivilegeMapperEntry.interface.yaml
index 84dfdc3..e629982 100644
--- a/xyz/openbmc_project/User/PrivilegeMapperEntry.interface.yaml
+++ b/xyz/openbmc_project/User/PrivilegeMapperEntry.interface.yaml
@@ -19,7 +19,7 @@
           xyz.openbmc_project.Common.Error.InvalidArgument exception will be
           thrown if the privilege is invalid. Additional documentation
           on privilege is available here.
-          https://github.com/openbmc/docs/blob/master/architecture/user_management.md
+          https://github.com/openbmc/docs/blob/master/architecture/user-management.md
 
       errors:
         - xyz.openbmc_project.Common.Error.InternalFailure