docs(release): changelog check B looks for images/*/Dockerfile, which does not exist #4892

Check B of the changelog verification in docs/release.md never finds a changed image. It lists changed image build files with:

git diff --name-only $PREV..$NEW -- 'images/*/Dockerfile'

There is no images/ directory at the repository root. Image build files live under packages/*/*/images/, so the command prints nothing on every release and the check passes without looking at anything. For example, cfa9c5a changes packages/core/testing/images/e2e-sandbox/Dockerfile, and the pathspec above returns no files for it, while '*Dockerfile' returns that file.

The line also skips Containerfile, which new first-party images use.

A pathspec like '*Dockerfile' '*Containerfile' covers both. I have not checked how much noise vendored chart images add to it.