vars: We now have a script for build id

TODO: Fully automate
Change-Id: Ibdcd15f24cbe6477ac84d63f019ff1f145fa2def
diff --git a/vars/redfin b/vars/redfin
index 02218a9..6ac1a6b 100644
--- a/vars/redfin
+++ b/vars/redfin
@@ -22,7 +22,7 @@
   device/google/redfin
 )
 
-# Updated manually
+# Updated semi-manually via pixel/update-any-var.sh
 
 readonly prev_build_id=SQ3A.220605.009.A1 # Jun 2022
 readonly build_id=SQ3A.220705.003.A1 # Jul 2022