vars: We now have a script for build id

TODO: Fully automate
Change-Id: Ibdcd15f24cbe6477ac84d63f019ff1f145fa2def
diff --git a/vars/bonito b/vars/bonito
index 5bbf133..9fb0778 100644
--- a/vars/bonito
+++ b/vars/bonito
@@ -21,7 +21,7 @@
   device/google/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