SearchController Test: Fix test

test/pleroma/web/mastodon_api/controllers/search_controller_test.exs

@@ -279,6 +279,8 @@ test "search", %{conn: conn} do
     end
 
     test "search fetches remote statuses and prefers them over other results", %{conn: conn} do
+      clear_config([:instance, :search_function], :plain)
+
       capture_log(fn ->
         {:ok, %{id: activity_id}} =
           CommonAPI.post(insert(:user), %{