vars: We now have a script for build id

TODO: Fully automate
Change-Id: Ibdcd15f24cbe6477ac84d63f019ff1f145fa2def
diff --git a/vars/sargo b/vars/sargo
index c226757..b685066 100644
--- a/vars/sargo
+++ b/vars/sargo
@@ -21,7 +21,7 @@
   # common repos in bonito
 )
 
-# Updated manually
+# Updated semi-manually via pixel/update-any-var.sh
 
 readonly prev_build_id=SP2A.220505.002 # May 2022
 readonly build_id=SP2A.220505.006 # May 2022