Update Rust crate once_cell to 1.16.0 (#1615)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [once_cell](https://github.com/matklad/once_cell) | dependencies | minor | `1.15.0` -> `1.16.0` |

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### Release Notes

<details>
<summary>matklad/once_cell</summary>

### [`v1.16.0`](https://github.com/matklad/once_cell/blob/HEAD/CHANGELOG.md#&#8203;1160)

[Compare Source](matklad/once_cell@v1.15.0...v1.16.0)

-   Add `no_std` implementation based on `critical-section`,
    [#&#8203;195](matklad/once_cell#195).
-   Deprecate `atomic-polyfill` feature (use the new `critical-section` instead)

</details>

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### Configuration

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Co-authored-by: cabr2-bot <cabr2.help@gmail.com>
Reviewed-on: https://codeberg.org/Calciumdibromid/CaBr2/pulls/1615
Reviewed-by: crapStone <crapstone@noreply.codeberg.org>
Co-authored-by: Calciumdibromid Bot <cabr2_bot@noreply.codeberg.org>
Co-committed-by: Calciumdibromid Bot <cabr2_bot@noreply.codeberg.org>

webserver/Cargo.toml

@@ -24,7 +24,7 @@ types = { path = "../crates/types/" }
 uuid = { version = "1.2.1", features = ["serde", "v4"] }
 warp = "0.3.3"
 structopt = "0.3.26"
-once_cell = "1.15.0"
+once_cell = "1.16.0"
 
 [features]
 portable = [ "config/portable" ]