Update axum requirement from 0.7 to 0.8 (#10)

Updates the requirements on [axum](https://github.com/tokio-rs/axum) to permit the latest version.
- [Release notes](https://github.com/tokio-rs/axum/releases)
- [Changelog](https://github.com/tokio-rs/axum/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tokio-rs/axum/commits)

---
updated-dependencies:
- dependency-name: axum
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 
 [dependencies]
 # -- Web
-axum = {version = "0.7", features = ["macros", "tokio"] }
+axum = {version = "0.8", features = ["macros", "tokio"] }
 tower = { version = "0.5", features = ["util"]} # ["limit", "buffer", "util", "filter"]
 tower-http = { version = "0.6", features = ["fs", "trace"]}
 http-body-util = "0.1"