Update dependency remark-mdx-frontmatter to v3 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
remark-mdx-frontmatter	^2.0.0 -> ^3.0.0

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Release Notes

remcohaszing/remark-mdx-frontmatter (remark-mdx-frontmatter)

### [`v3.0.0`](https://togithub.com/remcohaszing/remark-mdx-frontmatter/releases/tag/v3.0.0) [Compare Source](https://togithub.com/remcohaszing/remark-mdx-frontmatter/compare/v2.1.1...v3.0.0) - Require Node.js 16 or greater. - Remove support for using object keys as export names. The default name is now `frontmatter`.

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Configuration

📅 Schedule: Branch creation - "before 3am on Monday" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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Name	Status	Preview	Comments	Updated (UTC)
mdx	❌ Failed (Inspect)			Sep 9, 2023 4:02pm

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (07e2b36) 100.00% compared to head (573f277) 100.00%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2304 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 23 23 Lines 2239 2239 Branches 4 4 ========================================= Hits 2239 2239 ```

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