fix(deps): update rust crate axum to v0.7.6 (#45)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [axum](https://redirect.github.com/tokio-rs/axum) | dependencies |
patch | `0.7.4` -> `0.7.6` |

---

### Release Notes

<details>
<summary>tokio-rs/axum (axum)</summary>

###
[`v0.7.6`](https://redirect.github.com/tokio-rs/axum/releases/tag/axum-extra-v0.7.6):
axum-extra - v0.7.6

[Compare
Source](https://redirect.github.com/tokio-rs/axum/compare/axum-v0.7.5...axum-v0.7.6)

-   **fixed:** Remove unused dependency ([#&#8203;2135])

[#&#8203;2135]: https://redirect.github.com/tokio-rs/axum/pull/2135

###
[`v0.7.5`](https://redirect.github.com/tokio-rs/axum/releases/tag/axum-v0.7.5):
axum - v0.7.5

[Compare
Source](https://redirect.github.com/tokio-rs/axum/compare/axum-v0.7.4...axum-v0.7.5)

- **fixed:** Fixed layers being cloned when calling `axum::serve`
directly with
    a `Router` or `MethodRouter` ([#&#8203;2586])
- **fixed:** `h2` is no longer pulled as a dependency unless the `http2`
feature
    is enabled ([#&#8203;2605])

[#&#8203;2586]: https://redirect.github.com/tokio-rs/axum/pull/2586

[#&#8203;2605]: https://redirect.github.com/tokio-rs/axum/pull/2605

</details>

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