[BUGFIX] Add missing parenthesis

This adds a missing parenthesis in the label `config.backendLogo` for
extension configuration `backend.backendLogo`.

Resolves: #89441
Releases: master, 9.5
Change-Id: Ibeda58b7fb6dc18cb13d9ccfda3580b92d376ee7
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61980
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>

typo3/sysext/backend/Resources/Private/Language/locallang.xlf

@@ -38,7 +38,7 @@ Have a nice day.</source>
 				<source>Footnote: If set, this text will be displayed on the login screen to provide copyright information for the background image (e.g. © 2017 by Foo Bar) or a descriptive text</source>
 			</trans-unit>
 			<trans-unit id="config.backendLogo" resname="config.backendLogo">
-				<source>Logo: If set, this logo will be used instead of the TYPO3 logo in the TYPO3 Backend in the left top corner (e.g. fileadmin/images/backend-logo.png or EXT:my_theme/Resources/Public/Images/backend-logo.png</source>
+				<source>Logo: If set, this logo will be used instead of the TYPO3 logo in the TYPO3 Backend in the left top corner (e.g. fileadmin/images/backend-logo.png or EXT:my_theme/Resources/Public/Images/backend-logo.png)</source>
 			</trans-unit>
 			<trans-unit id="config.backendFavicon" resname="config.backendFavicon">
 				<source>Favicon: If set, this favicon will be used instead of the TYPO3 logo (e.g. EXT:my_theme/Resources/Public/Images/favicon.ico)</source>