Update Rust crate pulldown-cmark to v0.12.2 (#20325)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [pulldown-cmark](https://redirect.github.com/raphlinus/pulldown-cmark)
| workspace.dependencies | patch | `0.12.1` -> `0.12.2` |

---

### Release Notes

<details>
<summary>raphlinus/pulldown-cmark (pulldown-cmark)</summary>

###
[`v0.12.2`](https://redirect.github.com/pulldown-cmark/pulldown-cmark/releases/tag/v0.12.2):
0.12.2

[Compare
Source](https://redirect.github.com/raphlinus/pulldown-cmark/compare/v0.12.1...v0.12.2)

#### What's Changed

- Fix compiilation error in fuzzers by
[@&#8203;kdarkhan](https://redirect.github.com/kdarkhan) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/947](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/947)
- Make `fuzz` dir part of the workspace by
[@&#8203;kdarkhan](https://redirect.github.com/kdarkhan) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/948](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/948)
- Fix and improve `bench` by
[@&#8203;notriddle](https://redirect.github.com/notriddle) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/950](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/950)
- Reuse a couple hash maps across blocks by
[@&#8203;notriddle](https://redirect.github.com/notriddle) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/951](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/951)
- Reuse outer indent between item list, def list, and blockquote by
[@&#8203;notriddle](https://redirect.github.com/notriddle) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/952](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/952)
- Add instructions on fixing fuzz build by
[@&#8203;kdarkhan](https://redirect.github.com/kdarkhan) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/953](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/953)
- Account for definition list fixups while popping containers by
[@&#8203;notriddle](https://redirect.github.com/notriddle) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/954](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/954)
- Use byte range instead of char count for delim run bounds by
[@&#8203;notriddle](https://redirect.github.com/notriddle) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/956](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/956)
- CI improvements by
[@&#8203;kdarkhan](https://redirect.github.com/kdarkhan) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/955](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/955)
- Fix a problem that causes multiple dt's to be parsed by
[@&#8203;notriddle](https://redirect.github.com/notriddle) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/958](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/958)
- fix: emit `InlineHtml` for inline HTML inside blockquote instead of
`Html` by [@&#8203;rhysd](https://redirect.github.com/rhysd) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/961](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/961)
- Complete the list of block item bodies by
[@&#8203;notriddle](https://redirect.github.com/notriddle) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/962](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/962)
- Implement into_static for CowStr and Event in pulldown-cmark by
[@&#8203;Atreyagaurav](https://redirect.github.com/Atreyagaurav) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/967](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/967)
- Enforce cargo fmt by
[@&#8203;ollpu](https://redirect.github.com/ollpu) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/971](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/971)
- Respect line starts when trimming header endings by
[@&#8203;notriddle](https://redirect.github.com/notriddle) in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/969](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/969)

#### New Contributors

- [@&#8203;Atreyagaurav](https://redirect.github.com/Atreyagaurav) made
their first contribution in
[https://github.com/pulldown-cmark/pulldown-cmark/pull/967](https://redirect.github.com/pulldown-cmark/pulldown-cmark/pull/967)

**Full Changelog**:
https://github.com/pulldown-cmark/pulldown-cmark/compare/v0.12.1...v0.12.2

</details>

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