Update dependency pydantic to v2.8.1 (#366)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [pydantic](https://togithub.com/pydantic/pydantic)
([changelog](https://docs.pydantic.dev/latest/changelog/)) | `2.8.0` ->
`2.8.1` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/pydantic/2.8.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/pydantic/2.8.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/pydantic/2.8.0/2.8.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pydantic/2.8.0/2.8.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>pydantic/pydantic (pydantic)</summary>

###
[`v2.8.1`](https://togithub.com/pydantic/pydantic/releases/tag/v2.8.1):
(2024-07-03)

[Compare
Source](https://togithub.com/pydantic/pydantic/compare/v2.8.0...v2.8.1)

#### What's Changed

##### Packaging

- Bump `ruff` to `v0.5.0` and `pyright` to `v1.1.369` by
[@&#8203;sydney-runkle](https://togithub.com/sydney-runkle) in
[https://github.com/pydantic/pydantic/pull/9801](https://togithub.com/pydantic/pydantic/pull/9801)
- Bump `pydantic-core` to `v2.20.1`, `pydantic-extra-types` to `v2.9.0`
by [@&#8203;sydney-runkle](https://togithub.com/sydney-runkle) in
[https://github.com/pydantic/pydantic/pull/9832](https://togithub.com/pydantic/pydantic/pull/9832)

##### Fixes

- Fix breaking change in `to_snake` from v2.7 -> v2.8 by
[@&#8203;sydney-runkle](https://togithub.com/sydney-runkle) in
[https://github.com/pydantic/pydantic/pull/9812](https://togithub.com/pydantic/pydantic/pull/9812)
- Fix list constraint json schema application by
[@&#8203;sydney-runkle](https://togithub.com/sydney-runkle) in
[https://github.com/pydantic/pydantic/pull/9818](https://togithub.com/pydantic/pydantic/pull/9818)
- Fix issue with assertion caused by pluggable schema validator by
[@&#8203;dmontagu](https://togithub.com/dmontagu) in
[https://github.com/pydantic/pydantic/pull/9838](https://togithub.com/pydantic/pydantic/pull/9838)

#### New Contributors

- [@&#8203;kwint](https://togithub.com/kwint) made their first
contribution in
[https://github.com/pydantic/pydantic/pull/9787](https://togithub.com/pydantic/pydantic/pull/9787)
-
[@&#8203;seekinginfiniteloop](https://togithub.com/seekinginfiniteloop)
made their first contribution in
[https://github.com/pydantic/pydantic/pull/9822](https://togithub.com/pydantic/pydantic/pull/9822)

**Full Changelog**:
pydantic/pydantic@v2.8.0...v2.8.1

</details>

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