fix(deps): update dependency @mui/joy to v5.0.0-beta.7 (#257)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [@mui/joy](https://mui.com/joy-ui/getting-started/)
([source](https://togithub.com/mui/material-ui)) | [`5.0.0-beta.6` ->
`5.0.0-beta.7`](https://renovatebot.com/diffs/npm/@mui%2fjoy/5.0.0-beta.6/5.0.0-beta.7)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/@mui%2fjoy/5.0.0-beta.7?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/@mui%2fjoy/5.0.0-beta.7?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/@mui%2fjoy/5.0.0-beta.6/5.0.0-beta.7?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@mui%2fjoy/5.0.0-beta.6/5.0.0-beta.7?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>mui/material-ui (@&#8203;mui/joy)</summary>

###
[`v5.0.0-beta.7`](https://togithub.com/mui/material-ui/blob/HEAD/CHANGELOG.md#muijoy500-beta7)

[Compare
Source](https://togithub.com/mui/material-ui/compare/8255b71ccdbfe9a20f856b5d68a269ab1c5452ca...14e97bffa62760cabcdc7244bff445b423f5286a)

- ​<!-- 26 -->\[AccordionGroup]\[joy-ui] Fix console warning when using
custom color
([#&#8203;38950](https://togithub.com/mui/material-ui/issues/38950))
[@&#8203;sai6855](https://togithub.com/sai6855)
- ​<!-- 07 -->\[GlobalStyles]\[joy-ui] Ensure compatibility with RSC
([#&#8203;38955](https://togithub.com/mui/material-ui/issues/38955))
[@&#8203;mateuseap](https://togithub.com/mateuseap)

</details>

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