Fix missing use

Author: kraenhansen

tests/Builder/Stage/ScoreFusionStageTest.php

@@ -6,6 +6,8 @@
 
 use MongoDB\Builder\Pipeline;
 use MongoDB\Builder\Stage;
+use MongoDB\Builder\Search;
+use MongoDB\Builder\Expression;
 use MongoDB\Tests\Builder\PipelineTestCase;
 
 /**