Re-order changelog entries for 0.9.7 (#16344)
## Summary
This is mainly on me for not noticing this during the last release but I
noticed in the last changelog that there's only 1 bug fix which didn't
seem correct as I saw multiple of them so I looked at a couple of PRs
that are in "Rule changes" section and the PRs that were marked with the
`bug` label was categorized there because
1. It _also_ had other labels like `rule` and `fixes`
(https://github.com/astral-sh/ruff/pull/16080,
https://github.com/astral-sh/ruff/pull/16110,
https://github.com/astral-sh/ruff/pull/16219, etc.)
2. Some PRs didn't have the `bug` label (but the issue as marked as
`bug`) but _only_ labels like "fixes"
(https://github.com/astral-sh/ruff/pull/16011,
https://github.com/astral-sh/ruff/pull/16132, etc.)
