Bump ouroboros from 0.9.5 to 0.15.4 in /src/rust

Bumps [ouroboros](https://github.com/joshua-maros/ouroboros) from 0.9.5 to 0.15.4.
- [Release notes](https://github.com/joshua-maros/ouroboros/releases)
- [Commits](https://github.com/joshua-maros/ouroboros/commits)

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

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

Author: dependabot[bot]

src/rust/Cargo.lock

@@ -10,7 +10,7 @@ lazy_static = "1"
 pyo3 = { version = "0.13.1" }
 asn1 = { version = "0.5.3", default-features = false, features = ["derive"] }
 chrono = { version = "0.4", default-features = false, features = ["alloc"] }
-ouroboros = "0.9"
+ouroboros = "0.15"
 
 [features]
 extension-module = ["pyo3/extension-module"]