timetracker uses removed method `execute()`

[MasinAD]

According to this forum post the method execute() in QueryBuilder has been removed.

Nextcloud version: 33.0.0

root@nextcloud:~# sudo -u www-data php /var/www/nextcloud/occ app:enable timetracker
An unhandled exception has been thrown:
Error: Call to undefined method OC\DB\QueryBuilder\QueryBuilder::execute() in /var/www/nextcloud/apps/timetracker/lib/Migration/Version000000Date20210719124731.php:416
Stack trace:
#0 /var/www/nextcloud/apps/timetracker/lib/Migration/Version000000Date20210719124731.php(394): OCA\TimeTracker\Migration\Version000000Date20210719124731->moveTimeTrackerWorkIntervalToTag()
#1 /var/www/nextcloud/lib/private/DB/MigrationService.php(528): OCA\TimeTracker\Migration\Version000000Date20210719124731->postSchemaChange()
#2 /var/www/nextcloud/lib/private/DB/MigrationService.php(401): OC\DB\MigrationService->executeStep()
#3 /var/www/nextcloud/lib/private/Installer.php(546): OC\DB\MigrationService->migrate()
#4 /var/www/nextcloud/lib/private/Installer.php(93): OC\Installer->installAppLastSteps()
#5 /var/www/nextcloud/core/Command/App/Enable.php(91): OC\Installer->installApp()
#6 /var/www/nextcloud/core/Command/App/Enable.php(64): OC\Core\Command\App\Enable->enableApp()
#7 /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php(326): OC\Core\Command\App\Enable->execute()
#8 /var/www/nextcloud/3rdparty/symfony/console/Application.php(1078): Symfony\Component\Console\Command\Command->run()
#9 /var/www/nextcloud/3rdparty/symfony/console/Application.php(324): Symfony\Component\Console\Application->doRunCommand()
#10 /var/www/nextcloud/3rdparty/symfony/console/Application.php(175): Symfony\Component\Console\Application->doRun()
#11 /var/www/nextcloud/lib/private/Console/Application.php(187): Symfony\Component\Console\Application->run()
#12 /var/www/nextcloud/console.php(92): OC\Console\Application->run()
#13 /var/www/nextcloud/occ(33): require_once('...')
#14 {main}