"changelog entry is empty for crate:" warning with a CHANGELOG.md present

[mkatychev]

Hello, I am attempting to use cargo smart-release --dry-run-cargo-publish --update-crates-index rex-sm and I keep getting the warning below for this commit:

[INFO ] Updating crates-io index
[INFO ] WOULD auto-bump provided package 'rex-sm' from 0.5.0 to 0.5.1 for publishing
[WARN ] rex-sm: The following tags were not encountered during commit graph traversal: refs/tags/v0.4.1
[INFO ] WOULD modify existing changelog for 'rex-sm'.
[INFO ] Up to 1 changelog would be previewed if the --execute is set and --no-changelog-preview is unset.
[WARN ] WOULD stop release after commit as the changelog entry is empty for crate: rex-sm
[WARN ] To fix the changelog manually, run: cargo changelog --write rex-sm

I have a CHANGELOG.md present and created with cargo changelog --write and it is not clear where the warning is coming from.

[Byron]

This means that the changelog is fully generated and does not have any explicit content, like the one it would add when it detected commits with fix|chore|feat|…: subjects.

To fix it, write the changelog and enter some information about the release manually, and commit. Typically that's where I write A maintenance release without user-facing changes. directly under the ### Unreleased section headline.

[mkatychev]

That makes sense, perhaps stating it as "No content for ## Unreleased" would clarify things

[Byron]

A PR for improving the wording would definitely be welcome.