chore(deps): bump axum from 0.7.5 to 0.8.4

Bumps [axum](https://github.com/tokio-rs/axum) from 0.7.5 to 0.8.4.
- [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-v0.7.5...axum-v0.8.4)

---
updated-dependencies:
- dependency-name: axum
  dependency-version: 0.8.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -14,7 +14,7 @@ path = "src/main.rs"
 
 [dependencies]
 anyhow = "1.0.70"
-axum = "0.7"
+axum = "0.8"
 base64 = "0.22"
 bs58 = { version = "0.4" }
 derive_more = "0.99.17"