chore(deps): update dependency pydantic to v2.6.3 (#565)

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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/)) | `==2.6.2`
-> `==2.6.3` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/pydantic/2.6.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/pydantic/2.6.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/pydantic/2.6.2/2.6.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pydantic/2.6.2/2.6.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

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

###
[`v2.6.3`](https://togithub.com/pydantic/pydantic/blob/HEAD/HISTORY.md#v263-2024-02-27)

[Compare
Source](https://togithub.com/pydantic/pydantic/compare/v2.6.2...v2.6.3)

[GitHub
release](https://togithub.com/pydantic/pydantic/releases/tag/v2.6.3)

##### What's Changed

##### Packaging

- Update `pydantic-settings` version in the docs by
[@&#8203;hramezani](https://togithub.com/hramezani) in
[#&#8203;8906](https://togithub.com/pydantic/pydantic/pull/8906)

##### Fixes

- Fix discriminated union schema gen bug by
[@&#8203;sydney-runkle](https://togithub.com/sydney-runkle) in
[#&#8203;8904](https://togithub.com/pydantic/pydantic/pull/8904)

</details>

---

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requirements.txt

@@ -7,7 +7,7 @@ nest_asyncio==1.6.0
 pdoc==14.4.0
 pip==24.0
 pre-commit==3.6.2
-pydantic==2.6.2
+pydantic==2.6.3
 pytest==8.0.2
 pytest-asyncio==0.23.5
 pytest-cov==4.1.0