build(deps): bump axum from 0.6.18 to 0.6.19

Bumps [axum](https://github.com/tokio-rs/axum) from 0.6.18 to 0.6.19.
- [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-v0.6.18...axum-v0.6.19)

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

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-axum = "0.6.18"
+axum = "0.6.19"
 serde = { version = "^1.0.171", features = ["derive"] }
 serde_json = "1.0.102"
 tectonic = "0.14.1"