Update Rust crate palette to v0.7.6 (#15307)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [palette](https://togithub.com/Ogeon/palette) | workspace.dependencies
| patch | `0.7.5` -> `0.7.6` |

---

### Release Notes

<details>
<summary>Ogeon/palette (palette)</summary>

###
[`v0.7.6`](https://togithub.com/Ogeon/palette/blob/HEAD/CHANGELOG.md#Version-076---2024-04-28)

[Compare
Source](https://togithub.com/Ogeon/palette/compare/0.7.5...0.7.6)

- \[[#&#8203;390](https://togithub.com/Ogeon/palette/issues/390)]\[390]:
Add `From` implementations for changing `Rgb` component types between
`u8`, `f32` and `f64`.
- \[[#&#8203;342](https://togithub.com/Ogeon/palette/issues/342)]\[342]:
Implement CAM16. Closes
\[[#&#8203;199](https://togithub.com/Ogeon/palette/issues/199)]\[199].
- \[[#&#8203;386](https://togithub.com/Ogeon/palette/issues/386)]\[386]:
Fix angle conversion from `f32` to `u8`. Closes
\[[#&#8203;385](https://togithub.com/Ogeon/palette/issues/385)]\[385].
- \[[#&#8203;384](https://togithub.com/Ogeon/palette/issues/384)]\[384]:
Add traits for color schemes from traditional color theory.

</details>

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Release Notes:

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