build(deps): update axum requirement from 0.7.7 to 0.8.1

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](tokio-rs/axum@axum-v0.7.7...axum-v0.7.9)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.toml

@@ -61,7 +61,7 @@ futures-util = "0.3.30"
 go-defer = "0.1.0"
 russh = "0.49.0"
 russh-keys = "0.49.1"
-axum = "0.7.7"
+axum = "0.8.1"
 axum-extra = "0.9.4"
 axum-server = "0.7.1"
 tower-http = "0.6.1"