fix create query builder on where condition for activity store

Author: webdev-dp

src/ActivityStore/MariaDb.php

@@ -283,7 +283,8 @@ public function getActivitiesDataForWebservice($pageSize, $page, ExportActivitie
             ->addOrderBy('activityDate', 'asc');
 
         if ($ts = $params->getModifiedSinceTimestamp()) {
-            $select->where('modificationDate >= ?', $ts);
+            $select->where('modificationDate >= ?');
+            $select->setParameters([$ts]);
         }
 
         $paginator = $this->paginator->paginate($select, $page, $pageSize);

src/ActivityStore/MySQL.php

@@ -151,7 +151,8 @@ public function getActivitiesDataForWebservice($pageSize, $page, ExportActivitie
             ->addOrderBy('activityDate', 'asc');
 
         if ($ts = $params->getModifiedSinceTimestamp()) {
-            $select->where('modificationDate >= ?', $ts);
+            $select->where('modificationDate >= ?');
+            $select->setParameters([$ts]);
         }
 
         $paginator = $this->paginator->paginate($select, $page, $pageSize);