Raise exposure slightly at Utah so we can see further

Change-Id: I82072de1c51ba1d199a85436a8d4a3dc877ee273
diff --git a/y2019/vision/target_sender.cc b/y2019/vision/target_sender.cc
index 4344cc9..b33d7ab 100644
--- a/y2019/vision/target_sender.cc
+++ b/y2019/vision/target_sender.cc
@@ -88,7 +88,7 @@
   bool log_images = false;
 
   aos::vision::CameraParams params0;
-  params0.set_exposure(50);
+  params0.set_exposure(60);
   params0.set_brightness(40);
   params0.set_width(640);
   params0.set_fps(15);