vars: We now have a script for build id

TODO: Fully automate
Change-Id: Ibdcd15f24cbe6477ac84d63f019ff1f145fa2def
diff --git a/vars/raven b/vars/raven
index 24c2fc4..cfde718 100644
--- a/vars/raven
+++ b/vars/raven
@@ -22,7 +22,7 @@
 # Need OTA zip for firmware, not supported by image_unpacker yet
 readonly needs_ota=true
 
-# 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