⬆️ Update dependency ruff to v0.6.9 🔒 (#331)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [ruff](https://docs.astral.sh/ruff)
([source](https://redirect.github.com/astral-sh/ruff),
[changelog](https://redirect.github.com/astral-sh/ruff/blob/main/CHANGELOG.md))
| `0.6.8` -> `0.6.9` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/ruff/0.6.9?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/ruff/0.6.9?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/ruff/0.6.8/0.6.9?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/ruff/0.6.8/0.6.9?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>astral-sh/ruff (ruff)</summary>

###
[`v0.6.9`](https://redirect.github.com/astral-sh/ruff/blob/HEAD/CHANGELOG.md#069)

[Compare
Source](https://redirect.github.com/astral-sh/ruff/compare/0.6.8...0.6.9)

##### Preview features

- Fix codeblock dynamic line length calculation for indented docstring
examples
([#&#8203;13523](https://redirect.github.com/astral-sh/ruff/pull/13523))
- \[`refurb`] Mark `FURB118` fix as unsafe
([#&#8203;13613](https://redirect.github.com/astral-sh/ruff/pull/13613))

##### Rule changes

- \[`pydocstyle`] Don't raise `D208` when last line is non-empty
([#&#8203;13372](https://redirect.github.com/astral-sh/ruff/pull/13372))
- \[`pylint`] Preserve trivia (i.e. comments) in `PLR5501` autofix
([#&#8203;13573](https://redirect.github.com/astral-sh/ruff/pull/13573))

##### Configuration

- \[`pyflakes`] Add `allow-unused-imports` setting for `unused-import`
rule (`F401`)
([#&#8203;13601](https://redirect.github.com/astral-sh/ruff/pull/13601))

##### Bug fixes

- Support ruff discovery in pip build environments
([#&#8203;13591](https://redirect.github.com/astral-sh/ruff/pull/13591))
- \[`flake8-bugbear`] Avoid short circuiting `B017` for multiple context
managers
([#&#8203;13609](https://redirect.github.com/astral-sh/ruff/pull/13609))
- \[`pylint`] Do not offer an invalid fix for `PLR1716` when the
comparisons contain parenthesis
([#&#8203;13527](https://redirect.github.com/astral-sh/ruff/pull/13527))
- \[`pyupgrade`] Fix `UP043` to apply to `collections.abc.Generator` and
`collections.abc.AsyncGenerator`
([#&#8203;13611](https://redirect.github.com/astral-sh/ruff/pull/13611))
- \[`refurb`] Fix handling of slices in tuples for `FURB118`, e.g.,
`x[:, 1]`
([#&#8203;13518](https://redirect.github.com/astral-sh/ruff/pull/13518))

##### Documentation

- Update GitHub Action link to `astral-sh/ruff-action`
([#&#8203;13551](https://redirect.github.com/astral-sh/ruff/pull/13551))

</details>

---

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