To make it super clear, here is the updated formal request with updated Ben file.
===========
Package:
release.debian.orgSeverity: normal
User:
release.debian.org@packages.debian.orgUsertags: transition
Hello Release Team,
We would like to transition libwebp to a new upstream version 1.2.1-6
that is already uploaded and built in experimental. No build problems
are expected in the reverse dependencies either. This was tested by
rebuilding a subset of packages listed on the transition web page:
https://release.debian.org/transitions/html/auto-libwebp.htmlPlease let us know if we can proceed with the upload to unstable. Also
a binNMU rebuild of reverse dependencies would be required afterwards.
Ben file:
title = "libwebp";
is_affected = .depends ~ "libwebp6" | .depends ~ "libwebp7";
is_good = .depends ~ "libwebp7";
is_bad = .depends ~ "libwebp6";