Rename config.json to aos_config.json

Plenty of other things are called config.json, so let's pick a more
unique name.

Change-Id: I6510a172ec62674dd1b11bd71cef9aac2480c612
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/y2022/control_loops/localizer/localizer_test.cc b/y2022/control_loops/localizer/localizer_test.cc
index 5857bda..79a69b5 100644
--- a/y2022/control_loops/localizer/localizer_test.cc
+++ b/y2022/control_loops/localizer/localizer_test.cc
@@ -284,7 +284,7 @@
 class EventLoopLocalizerTest : public ::testing::Test {
  protected:
   EventLoopLocalizerTest()
-      : configuration_(aos::configuration::ReadConfig("y2022/config.json")),
+      : configuration_(aos::configuration::ReadConfig("y2022/aos_config.json")),
         event_loop_factory_(&configuration_.message()),
         roborio_node_(
             aos::configuration::GetNode(&configuration_.message(), "roborio")),