Rename and fix Bulk::update() arrayFilters test

Query should not be passed as the first argument to Bulk::update(). As-is, the Query object was encoded as an empty BSON document and caused the update operation to match three documents instead of two. This happened to have no effect on the test result because arrayFilters ensured that only grades >= 100 were matched.

Author: jmikola

tests/bulk/bulkwrite-update-arrayFilters-001.phpt renamed to tests/bulk/bulkwrite-update-002.phpt

@@ -1,5 +1,5 @@
 --TEST--
-MongoDB\Driver\BulkWrite::update with arrayFilters
+MongoDB\Driver\BulkWrite::update() with arrayFilters option
 --SKIPIF--
 <?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
 <?php skip_if_not_live(); ?>
@@ -21,7 +21,7 @@ $manager->executeBulkWrite(DATABASE_NAME . '.' . COLLECTION_NAME, $bulk);
 
 $updateBulk = new MongoDB\Driver\BulkWrite();
 
-$query = new MongoDB\Driver\Query(['grades' => ['$gte' => 100]]);
+$query = ['grades' => ['$gte' => 100]];
 $update = [ '$set' => [ 'grades.$[element]' => 100 ] ];
 $options = [
     'arrayFilters' => [ [ 'element' => [ '$gte' => 100 ] ] ],