SQLBI Whiteboard 0.1.0 (dev 3209)

Do not generate a changelog for GitHub releases (#9)

Run #20260817.7 built and signed everything, collected the right assets,
and then failed in `GitHubRelease@1`:

```
Fetching the latest published release...   -> No releases are published yet
Found the initial commit: 27e1ffa...
Fetching the list of commits since the last published release...
##[error]An unexpected error occurred while fetching the list of changes.
##[error]Error: Not Found
```

With no previous release to compare against, the task attempts a
changelog spanning every
commit from the repository's initial one. That is a cosmetic feature
blocking the release it
is supposed to decorate, so it is off for both channels. The inline
notes already say what
each build is.

Everything else in that run worked: both matrix legs built and signed,
the assets were
collected per channel, and the Release stage correctly paused for
approval.