[BUGFIX] Install tool: Double <hr> in upgrade wizards

Remove <hr> of last wizard.

Change-Id: I25a52d882e99333d4598e1dcc632300e2a8860ac
Resolves: #82158
Releases: master
Reviewed-on: https://review.typo3.org/53768


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Frans Saris <franssaris@gmail.com>
Reviewed-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Tested-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>