build(deps): bump axum from 0.6.20 to 0.7.7

Bumps [axum](https://github.com/tokio-rs/axum) from 0.6.20 to 0.7.7.
- [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-v0.6.20...axum-v0.7.7)

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

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

Cargo.toml

@@ -8,7 +8,7 @@ edition = "2021"
 
 [dependencies]
 argon2 = "0.5.3"
-axum = "0.6.20" # this *must* be pinned because 0.7.x relies on hyper 1.x causing a ton of type conversion issues
+axum = "0.7.7" # this *must* be pinned because 0.7.x relies on hyper 1.x causing a ton of type conversion issues
 base64 = "0.22.0"
 chrono = { version = "0.4.34", default-features = false, features = [
     "std",