[BUGFIX] Hardcoded "admin" user in Installer template

The hardcoded username "admin" is removed from the HTML template
since the username can now be freely chosen.

Resolves: #53905
Releases: 6.2
Change-Id: I1c2846e60ee57f5e220405a9217fc1023d4d8bee
Reviewed-on: https://review.typo3.org/25668
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind

typo3/sysext/install/Resources/Private/Templates/Action/Step/DefaultConfiguration.html

@@ -8,7 +8,7 @@
 	<p>
 		Installation done! This last step will set some configuration values based on your
 		system environment and redirects to the TYPO3 CMS backend ready for you to log in
-		with user "admin" and your previously set password.
+		with the user you just created.
 	</p>
 
 	<form method="post">