[BUGFIX] Show user's real name in detail view

This patch corrects an invalid variable name in order to show the real
name of a backend user in the user's detail view.

Resolves: #90459
Releases: master
Change-Id: Ic063a48b1ade625cb303973b6043d1c19a404c43
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63339


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>

typo3/sysext/beuser/Resources/Private/Templates/BackendUser/Show.html

@@ -37,7 +37,7 @@
                 <a href="#" class="t3js-contextmenutrigger" data-table="be_users" data-uid="{data.user.uid}" title="id={data.user.uid}">
                     <be:avatar backendUser="{data.user.uid}" showIcon="true"/>
                 </a>
-                {data.user.userName}
+                {data.user.realName}
                 <be:link.editRecord class="btn btn-default pull-right" table="be_users" uid="{data.user.uid}"
                                     title="edit">
                     <core:icon identifier="actions-open"/>