[autotest] Uprev the stable version for 67 release

BUG=chromium:852628
TEST=tryjob

Change-Id: Ic490def90145ddbd84a8a1a544772681909278f3
Reviewed-on: https://chromium-review.googlesource.com/1100297
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Keith Haddow <haddowk@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1104790
Commit-Queue: Keith Haddow <haddowk@chromium.org>
Trybot-Ready: Keith Haddow <haddowk@chromium.org>
diff --git a/moblab_config.ini b/moblab_config.ini
index 048f82c..25bf7d7 100644
--- a/moblab_config.ini
+++ b/moblab_config.ini
@@ -35,7 +35,7 @@
 cts_results_server:
 # In moblab, this paramater is empty and uses the image bucket by default.
 results_storage_server:
-stable_cros_version: R66-10452.74.0
+stable_cros_version: R67-10575.55.0
 
 # The pubsub topic the gs_offloader notification is sent to.
 cloud_notification_topic: projects/chromeos-partner-moblab/topics/moblab-notification