Update RUCSSQueueRunner.php fixes wp-media#6119

See:  wp-media#6119 for details

TL;DR

Fixes error:
```
PHP Fatal error: Uncaught InvalidArgumentException: The group "rocket-rucss" does not exist. in /srv/users/stgleather/apps/stgleather/public/wp-content/plugins/woocommerce/packages/action-scheduler/classes/data-stores/ActionScheduler_DBStore.php:907
```

inc/Engine/Common/Queue/RUCSSQueueRunner.php

@@ -213,11 +213,11 @@ protected function do_batch( $size = 100, $context = '' ) {
 			$this->store->release_claim( $claim );
 			$this->monitor->detach();
 			$this->clear_caches();
-
+                        $this->store->set_claim_filter( 'group', '' );
 			return $processed_actions;
 		} catch ( \Exception $exception ) {
 			Logger::debug( $exception->getMessage() );
-
+                        $this->store->set_claim_filter( 'group', '' );
 			return 0;
 		}
 	}