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] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-axum = { version = "0.7", features = ["multipart"] }
+axum = { version = "0.8", features = ["multipart"] }
 tokio={version="1.45", features = ["full"] }
 imageproc="0.25"
 resvg="0.45"