Migrate default revision back to master

Change-Id: Ifb4379030a14e12ab0ddafadc04d0006b32a155b
diff --git a/mendel.xml b/mendel.xml
index 79f8070..bf654c1 100644
--- a/mendel.xml
+++ b/mendel.xml
@@ -5,7 +5,7 @@
     <remote fetch="sso://aiyprojects" name="coral-internal"
       review="sso://aiyprojects" />
 
-    <default remote="coral" revision="release-day" />
+    <default remote="coral" revision="master" />
 
     <project name="gke-jenkins" path="gke-jenkins"
       groups="notdefault,cicd" revision="master" />