Update Mysql.php

add missing colon

Author: jonashrem

dev/tests/integration/framework/Magento/TestFramework/Db/Mysql.php

@@ -125,7 +125,7 @@ public function storeDbDump()
         $format = sprintf(
             '%s %s %s %s',
             'mysqldump --defaults-file=%s --host=%s --port=%s',
-            '--no-tablespaces'
+            '--no-tablespaces',
             $additionalArguments,
             '%s > %s'
         );