[BUGFIX] Cast id to integer in class BackendUserConfigurationUpdate

The newly introduced BackendUserConfigurationUpdate tries to pass a
string value id to the updateBackendUser() function, which requires an
integer. This commit solves that problem

Resolves: #89683
Releases: master, 9.5
Change-Id: Ieca98c01ec44b7e3a4275d645fa6d25ea09d63a2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62392
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>

typo3/sysext/install/Classes/Updates/BackendUserConfigurationUpdate.php

@@ -102,7 +102,7 @@ public function executeUpdate(): bool
                 }
             });
 
-            $this->updateBackendUser($backendUser['uid'], $userConfig);
+            $this->updateBackendUser((int)$backendUser['uid'], $userConfig);
         }
 
         return true;