Bump branch number after creating branch stabilize-volteer-12931.B.

Change-Id: Id3a808fe106536f7dc0096a86ea1ce50518d06e8
diff --git a/chromeos/config/chromeos_version.sh b/chromeos/config/chromeos_version.sh
index 264e18f..6dd2a48 100755
--- a/chromeos/config/chromeos_version.sh
+++ b/chromeos/config/chromeos_version.sh
@@ -20,7 +20,7 @@
   # Release Branch number.
   # Increment by 1 for every release build on a branch.
   # Reset to 0 when increasing release build number.
-  CHROMEOS_BRANCH=0
+  CHROMEOS_BRANCH=1
 
   # Patch number.
   # Increment by 1 in case a non-scheduled branch release build is necessary.