Update dependency mdformat-mkdocs to v4 (#15011)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[mdformat-mkdocs](https://redirect.github.com/kyleking/mdformat-mkdocs)
([changelog](https://redirect.github.com/kyleking/mdformat-mkdocs/releases))
| `==3.1.1` -> `==4.0.0` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/mdformat-mkdocs/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/mdformat-mkdocs/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/mdformat-mkdocs/3.1.1/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/mdformat-mkdocs/3.1.1/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>kyleking/mdformat-mkdocs (mdformat-mkdocs)</summary>

###
[`v4.0.0`](https://redirect.github.com/KyleKing/mdformat-mkdocs/releases/tag/v4.0.0)

[Compare
Source](https://redirect.github.com/kyleking/mdformat-mkdocs/compare/v3.1.1...v4.0.0)

#### What's Changed

- fix!: add newline after title for consistency with MKDocs style by
[@&#8203;KyleKing](https://redirect.github.com/KyleKing) in
[https://github.com/KyleKing/mdformat-mkdocs/pull/44](https://redirect.github.com/KyleKing/mdformat-mkdocs/pull/44)

**Full Changelog**:
https://github.com/KyleKing/mdformat-mkdocs/compare/v3.1.1...v4.0.0

</details>

---

### Configuration

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are satisfied.

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---

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---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/astral-sh/ruff).

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---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>
Co-authored-by: Kyle King <KyleKing@users.noreply.github.com>

docs/editors/features.md

@@ -95,6 +95,7 @@ Similar to Ruff's CLI, the Ruff Language Server fully supports Jupyter Notebook
 capabilities available to Python files.
 
 !!! note
+
     Unlike [`ruff-lsp`](https://github.com/astral-sh/ruff-lsp) and similar to the Ruff's CLI, the
     native language server requires user to explicitly include the Jupyter Notebook files in the set
     of files to lint and format. Refer to the [Jupyter Notebook discovery](https://docs.astral.sh/ruff/configuration/#jupyter-notebook-discovery)