Update Rust crate axum-prometheus to 0.6.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
axum-prometheus	dependencies	minor	0.5.0 -> 0.6.0

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Release Notes

Ptrskay3/axum-prometheus (axum-prometheus)

### [`v0.6.0`](https://togithub.com/Ptrskay3/axum-prometheus/blob/HEAD/CHANGELOG.md#060---2024-01-22) [Compare Source](https://togithub.com/Ptrskay3/axum-prometheus/compare/0.5.0...0.6.0) - Update `metrics-exporter-prometheus` to `0.13` and `metrics` to `0.22`. \[[#​39](https://togithub.com/Ptrskay3/axum-prometheus/issues/39)]

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